patch-2.4.19 linux-2.4.19/arch/ppc64/kernel/prom.c
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- Lines: 2367
- Date:
Fri Aug 2 17:39:43 2002
- Orig file:
linux-2.4.18/arch/ppc64/kernel/prom.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -urN linux-2.4.18/arch/ppc64/kernel/prom.c linux-2.4.19/arch/ppc64/kernel/prom.c
@@ -0,0 +1,2366 @@
+/*
+ *
+ *
+ * Procedures for interfacing to Open Firmware.
+ *
+ * Paul Mackerras August 1996.
+ * Copyright (C) 1996 Paul Mackerras.
+ *
+ * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
+ * {engebret|bergner}@us.ibm.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#if 0
+#define DEBUG_YABOOT
+#endif
+
+#if 0
+#define DEBUG_PROM
+#endif
+
+#include <stdarg.h>
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/version.h>
+#include <linux/threads.h>
+#include <linux/spinlock.h>
+#include <linux/blk.h>
+
+#ifdef DEBUG_YABOOT
+#define call_yaboot(FUNC,...) \
+ do { \
+ if (FUNC) { \
+ struct prom_t *_prom = PTRRELOC(&prom); \
+ unsigned long prom_entry = _prom->entry;\
+ _prom->entry = (unsigned long)(FUNC); \
+ enter_prom(__VA_ARGS__); \
+ _prom->entry = prom_entry; \
+ } \
+ } while (0)
+#else
+#define call_yaboot(FUNC,...) do { ; } while (0)
+#endif
+
+#include <asm/init.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <asm/prom.h>
+#include <asm/rtas.h>
+#include <asm/lmb.h>
+#include <asm/abs_addr.h>
+#include <asm/page.h>
+#include <asm/processor.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/smp.h>
+#include <asm/system.h>
+#include <asm/mmu.h>
+#include <asm/pgtable.h>
+#include <asm/bitops.h>
+#include <asm/naca.h>
+#include <asm/pci.h>
+#include "open_pic.h"
+#include <asm/bootinfo.h>
+#include <asm/ppcdebug.h>
+
+#ifdef CONFIG_FB
+#include <asm/linux_logo.h>
+#endif
+
+extern char _end[];
+
+/*
+ * prom_init() is called very early on, before the kernel text
+ * and data have been mapped to KERNELBASE. At this point the code
+ * is running at whatever address it has been loaded at, so
+ * references to extern and static variables must be relocated
+ * explicitly. The procedure reloc_offset() returns the address
+ * we're currently running at minus the address we were linked at.
+ * (Note that strings count as static variables.)
+ *
+ * Because OF may have mapped I/O devices into the area starting at
+ * KERNELBASE, particularly on CHRP machines, we can't safely call
+ * OF once the kernel has been mapped to KERNELBASE. Therefore all
+ * OF calls should be done within prom_init(), and prom_init()
+ * and all routines called within it must be careful to relocate
+ * references as necessary.
+ *
+ * Note that the bss is cleared *after* prom_init runs, so we have
+ * to make sure that any static or extern variables it accesses
+ * are put in the data segment.
+ */
+
+
+#define PROM_BUG() do { \
+ prom_print(RELOC("kernel BUG at ")); \
+ prom_print(RELOC(__FILE__)); \
+ prom_print(RELOC(":")); \
+ prom_print_hex(__LINE__); \
+ prom_print(RELOC("!\n")); \
+ __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \
+} while (0)
+
+
+
+struct pci_reg_property {
+ struct pci_address addr;
+ u32 size_hi;
+ u32 size_lo;
+};
+
+
+struct isa_reg_property {
+ u32 space;
+ u32 address;
+ u32 size;
+};
+
+struct pci_intr_map {
+ struct pci_address addr;
+ u32 dunno;
+ phandle int_ctrler;
+ u32 intr;
+};
+
+
+typedef unsigned long interpret_func(struct device_node *, unsigned long,
+ int, int);
+#if 0
+static interpret_func interpret_pci_props;
+#endif
+static unsigned long interpret_pci_props(struct device_node *, unsigned long,
+ int, int);
+
+static interpret_func interpret_isa_props;
+static interpret_func interpret_root_props;
+
+#ifndef FB_MAX /* avoid pulling in all of the fb stuff */
+#define FB_MAX 8
+#endif
+
+
+struct prom_t prom = {
+ 0, /* entry */
+ 0, /* chosen */
+ 0, /* cpu */
+ 0, /* stdout */
+ 0, /* disp_node */
+ {0,0,0,{0},NULL}, /* args */
+ 0, /* version */
+ 32, /* encode_phys_size */
+ 0 /* bi_rec pointer */
+#ifdef DEBUG_YABOOT
+ ,NULL /* yaboot */
+#endif
+};
+
+
+char *prom_display_paths[FB_MAX] __initdata = { 0, };
+unsigned int prom_num_displays = 0;
+char *of_stdout_device = 0;
+
+extern struct rtas_t rtas;
+extern unsigned long klimit;
+extern unsigned long embedded_sysmap_end;
+extern struct lmb lmb;
+#ifdef CONFIG_MSCHUNKS
+extern struct msChunks msChunks;
+#endif /* CONFIG_MSCHUNKS */
+
+#define MAX_PHB 16 * 3 // 16 Towers * 3 PHBs/tower
+struct _of_tce_table of_tce_table[MAX_PHB + 1] = {{0, 0, 0}};
+
+char *bootpath = 0;
+char *bootdevice = 0;
+
+struct device_node *allnodes = 0;
+
+#define UNDEFINED_IRQ 0xffff
+unsigned short real_irq_to_virt_map[NR_HW_IRQS];
+unsigned short virt_irq_to_real_map[NR_IRQS];
+int last_virt_irq = 2; /* index of last virt_irq. Skip through IPI */
+
+static unsigned long call_prom(const char *service, int nargs, int nret, ...);
+static void prom_exit(void);
+static unsigned long copy_device_tree(unsigned long);
+static unsigned long inspect_node(phandle, struct device_node *, unsigned long,
+ unsigned long, struct device_node ***);
+static unsigned long finish_node(struct device_node *, unsigned long,
+ interpret_func *, int, int);
+static unsigned long finish_node_interrupts(struct device_node *, unsigned long);
+static unsigned long check_display(unsigned long);
+static int prom_next_node(phandle *);
+static struct bi_record * prom_bi_rec_verify(struct bi_record *);
+static unsigned long prom_bi_rec_reserve(unsigned long);
+static struct device_node *find_phandle(phandle);
+
+#ifdef CONFIG_MSCHUNKS
+static unsigned long prom_initialize_mschunks(unsigned long);
+#ifdef DEBUG_PROM
+void prom_dump_mschunks_mapping(void);
+#endif /* DEBUG_PROM */
+#endif /* CONFIG_MSCHUNKS */
+#ifdef DEBUG_PROM
+void prom_dump_lmb(void);
+#endif
+
+extern unsigned long reloc_offset(void);
+
+extern void enter_prom(void *dummy,...);
+
+void cacheable_memzero(void *, unsigned int);
+
+extern char cmd_line[512]; /* XXX */
+unsigned long dev_tree_size;
+
+#ifdef CONFIG_HMT
+struct {
+ unsigned int pir;
+ unsigned int threadid;
+} hmt_thread_data[NR_CPUS] = {0};
+#endif /* CONFIG_HMT */
+
+char testString[] = "LINUX\n";
+
+
+/* This is the one and *ONLY* place where we actually call open
+ * firmware from, since we need to make sure we're running in 32b
+ * mode when we do. We switch back to 64b mode upon return.
+ */
+
+static unsigned long __init
+call_prom(const char *service, int nargs, int nret, ...)
+{
+ int i;
+ unsigned long offset = reloc_offset();
+ struct prom_t *_prom = PTRRELOC(&prom);
+ va_list list;
+
+ _prom->args.service = (u32)LONG_LSW(service);
+ _prom->args.nargs = nargs;
+ _prom->args.nret = nret;
+ _prom->args.rets = (prom_arg_t *)&(_prom->args.args[nargs]);
+
+ va_start(list, nret);
+ for (i=0; i < nargs ;i++)
+ _prom->args.args[i] = (prom_arg_t)LONG_LSW(va_arg(list, unsigned long));
+ va_end(list);
+
+ for (i=0; i < nret ;i++)
+ _prom->args.rets[i] = 0;
+
+ enter_prom(&_prom->args);
+
+ return (unsigned long)((nret > 0) ? _prom->args.rets[0] : 0);
+}
+
+
+static void __init
+prom_exit()
+{
+ unsigned long offset = reloc_offset();
+
+ call_prom(RELOC("exit"), 0, 0);
+
+ for (;;) /* should never get here */
+ ;
+}
+
+void __init
+prom_enter(void)
+{
+ unsigned long offset = reloc_offset();
+
+ call_prom(RELOC("enter"), 0, 0);
+}
+
+
+void __init
+prom_print(const char *msg)
+{
+ const char *p, *q;
+ unsigned long offset = reloc_offset();
+ struct prom_t *_prom = PTRRELOC(&prom);
+
+ if (_prom->stdout == 0)
+ return;
+
+ for (p = msg; *p != 0; p = q) {
+ for (q = p; *q != 0 && *q != '\n'; ++q)
+ ;
+ if (q > p)
+ call_prom(RELOC("write"), 3, 1, _prom->stdout,
+ p, q - p);
+ if (*q != 0) {
+ ++q;
+ call_prom(RELOC("write"), 3, 1, _prom->stdout,
+ RELOC("\r\n"), 2);
+ }
+ }
+}
+
+void
+prom_print_hex(unsigned long val)
+{
+ int i, nibbles = sizeof(val)*2;
+ char buf[sizeof(val)*2+1];
+
+ for (i = nibbles-1; i >= 0; i--) {
+ buf[i] = (val & 0xf) + '0';
+ if (buf[i] > '9')
+ buf[i] += ('a'-'0'-10);
+ val >>= 4;
+ }
+ buf[nibbles] = '\0';
+ prom_print(buf);
+}
+
+void
+prom_print_nl(void)
+{
+ unsigned long offset = reloc_offset();
+ prom_print(RELOC("\n"));
+}
+
+
+static unsigned long
+prom_initialize_naca(unsigned long mem)
+{
+ phandle node;
+ char type[64];
+ unsigned long num_cpus = 0;
+ unsigned long offset = reloc_offset();
+ struct prom_t *_prom = PTRRELOC(&prom);
+ struct naca_struct *_naca = RELOC(naca);
+
+#ifdef DEBUG_PROM
+ prom_print(RELOC("prom_initialize_naca: start...\n"));
+#endif
+
+ _naca->pftSize = 0; /* ilog2 of htab size. computed below. */
+
+ for (node = 0; prom_next_node(&node); ) {
+ type[0] = 0;
+ call_prom(RELOC("getprop"), 4, 1, node, RELOC("device_type"),
+ type, sizeof(type));
+
+ if (!strcmp(type, RELOC("cpu"))) {
+ num_cpus += 1;
+
+ /* We're assuming *all* of the CPUs have the same
+ * d-cache and i-cache sizes... -Peter
+ */
+ if ( num_cpus == 1 ) {
+ u32 size;
+
+ call_prom(RELOC("getprop"), 4, 1, node,
+ RELOC("d-cache-line-size"),
+ &size, sizeof(size));
+
+ _naca->dCacheL1LineSize = size;
+ _naca->dCacheL1LogLineSize = __ilog2(size);
+ _naca->dCacheL1LinesPerPage = PAGE_SIZE / size;
+
+ call_prom(RELOC("getprop"), 4, 1, node,
+ RELOC("i-cache-line-size"),
+ &size, sizeof(size));
+
+ _naca->iCacheL1LineSize = size;
+ _naca->iCacheL1LogLineSize = __ilog2(size);
+ _naca->iCacheL1LinesPerPage = PAGE_SIZE / size;
+
+ if (_naca->platform == PLATFORM_PSERIES_LPAR) {
+ u32 pft_size[2];
+ call_prom(RELOC("getprop"), 4, 1, node,
+ RELOC("ibm,pft-size"),
+ &pft_size, sizeof(pft_size));
+ /* pft_size[0] is the NUMA CEC cookie */
+ _naca->pftSize = pft_size[1];
+ }
+ }
+ } else if (!strcmp(type, RELOC("serial"))) {
+ phandle isa, pci;
+ struct isa_reg_property reg;
+ union pci_range ranges;
+
+ type[0] = 0;
+ call_prom(RELOC("getprop"), 4, 1, node,
+ RELOC("ibm,aix-loc"), type, sizeof(type));
+
+ if (strcmp(type, RELOC("S1")))
+ continue;
+
+ call_prom(RELOC("getprop"), 4, 1, node, RELOC("reg"),
+ ®, sizeof(reg));
+
+ isa = call_prom(RELOC("parent"), 1, 1, node);
+ if (!isa)
+ PROM_BUG();
+ pci = call_prom(RELOC("parent"), 1, 1, isa);
+ if (!pci)
+ PROM_BUG();
+
+ call_prom(RELOC("getprop"), 4, 1, pci, RELOC("ranges"),
+ &ranges, sizeof(ranges));
+
+ if ( _prom->encode_phys_size == 32 )
+ _naca->serialPortAddr = ranges.pci32.phys+reg.address;
+ else {
+ _naca->serialPortAddr =
+ ((((unsigned long)ranges.pci64.phys_hi) << 32) |
+ (ranges.pci64.phys_lo)) + reg.address;
+ }
+ }
+ }
+
+ _naca->interrupt_controller = IC_INVALID;
+ for (node = 0; prom_next_node(&node); ) {
+ type[0] = 0;
+ call_prom(RELOC("getprop"), 4, 1, node, RELOC("name"),
+ type, sizeof(type));
+ if (strcmp(type, RELOC("interrupt-controller"))) {
+ continue;
+ }
+ call_prom(RELOC("getprop"), 4, 1, node, RELOC("compatible"),
+ type, sizeof(type));
+ if (strstr(type, RELOC("open-pic"))) {
+ _naca->interrupt_controller = IC_OPEN_PIC;
+ } else if (strstr(type, RELOC("ppc-xicp"))) {
+ _naca->interrupt_controller = IC_PPC_XIC;
+ } else {
+ prom_print(RELOC("prom: failed to recognize interrupt-controller\n"));
+ }
+ break;
+ }
+
+ if (_naca->interrupt_controller == IC_INVALID) {
+ prom_print(RELOC("prom: failed to find interrupt-controller\n"));
+ PROM_BUG();
+ }
+
+ /* We gotta have at least 1 cpu... */
+ if ( (_naca->processorCount = num_cpus) < 1 )
+ PROM_BUG();
+
+ _naca->physicalMemorySize = lmb_phys_mem_size();
+
+ if (_naca->platform == PLATFORM_PSERIES) {
+ unsigned long rnd_mem_size, pteg_count;
+
+ /* round mem_size up to next power of 2 */
+ rnd_mem_size = 1UL << __ilog2(_naca->physicalMemorySize);
+ if (rnd_mem_size < _naca->physicalMemorySize)
+ rnd_mem_size <<= 1;
+
+ /* # pages / 2 */
+ pteg_count = (rnd_mem_size >> (12 + 1));
+
+ _naca->pftSize = __ilog2(pteg_count << 7);
+ }
+
+ if (_naca->pftSize == 0) {
+ prom_print(RELOC("prom: failed to compute pftSize!\n"));
+ PROM_BUG();
+ }
+
+ /*
+ * Hardcode to GP size. I am not sure where to get this info
+ * in general, as there does not appear to be a slb-size OF
+ * entry. At least in Condor and earlier. DRENG
+ */
+ _naca->slb_size = 64;
+
+#ifdef DEBUG_PROM
+ prom_print(RELOC("naca->processorCount = 0x"));
+ prom_print_hex(_naca->processorCount);
+ prom_print_nl();
+
+ prom_print(RELOC("naca->physicalMemorySize = 0x"));
+ prom_print_hex(_naca->physicalMemorySize);
+ prom_print_nl();
+
+ prom_print(RELOC("naca->pftSize = 0x"));
+ prom_print_hex(_naca->pftSize);
+ prom_print_nl();
+
+ prom_print(RELOC("naca->dCacheL1LineSize = 0x"));
+ prom_print_hex(_naca->dCacheL1LineSize);
+ prom_print_nl();
+
+ prom_print(RELOC("naca->dCacheL1LogLineSize = 0x"));
+ prom_print_hex(_naca->dCacheL1LogLineSize);
+ prom_print_nl();
+
+ prom_print(RELOC("naca->dCacheL1LinesPerPage = 0x"));
+ prom_print_hex(_naca->dCacheL1LinesPerPage);
+ prom_print_nl();
+
+ prom_print(RELOC("naca->iCacheL1LineSize = 0x"));
+ prom_print_hex(_naca->iCacheL1LineSize);
+ prom_print_nl();
+
+ prom_print(RELOC("naca->iCacheL1LogLineSize = 0x"));
+ prom_print_hex(_naca->iCacheL1LogLineSize);
+ prom_print_nl();
+
+ prom_print(RELOC("naca->iCacheL1LinesPerPage = 0x"));
+ prom_print_hex(_naca->iCacheL1LinesPerPage);
+ prom_print_nl();
+
+ prom_print(RELOC("naca->serialPortAddr = 0x"));
+ prom_print_hex(_naca->serialPortAddr);
+ prom_print_nl();
+
+ prom_print(RELOC("naca->interrupt_controller = 0x"));
+ prom_print_hex(_naca->interrupt_controller);
+ prom_print_nl();
+
+ prom_print(RELOC("naca->platform = 0x"));
+ prom_print_hex(_naca->platform);
+ prom_print_nl();
+
+ prom_print(RELOC("prom_initialize_naca: end...\n"));
+#endif
+
+ return mem;
+}
+
+
+static unsigned long __init
+prom_initialize_lmb(unsigned long mem)
+{
+ phandle node;
+ char type[64];
+ unsigned long i, offset = reloc_offset();
+ struct prom_t *_prom = PTRRELOC(&prom);
+ union lmb_reg_property reg;
+ unsigned long lmb_base, lmb_size;
+ unsigned long num_regs, bytes_per_reg = (_prom->encode_phys_size*2)/8;
+
+#ifdef CONFIG_MSCHUNKS
+ unsigned long max_addr = 0;
+#if 1
+ /* Fix me: 630 3G-4G IO hack here... -Peter (PPPBBB) */
+ unsigned long io_base = 3UL<<30;
+ unsigned long io_size = 1UL<<30;
+ unsigned long have_630 = 1; /* assume we have a 630 */
+
+#else
+ unsigned long io_base = <real io base here>;
+ unsigned long io_size = <real io size here>;
+#endif
+#endif /* CONFIG_MSCHUNKS */
+
+ lmb_init();
+
+ for (node = 0; prom_next_node(&node); ) {
+ type[0] = 0;
+ call_prom(RELOC("getprop"), 4, 1, node, RELOC("device_type"),
+ type, sizeof(type));
+
+ if (strcmp(type, RELOC("memory")))
+ continue;
+
+ num_regs = call_prom(RELOC("getprop"), 4, 1, node, RELOC("reg"),
+ ®, sizeof(reg)) / bytes_per_reg;
+
+ for (i=0; i < num_regs ;i++) {
+ if (_prom->encode_phys_size == 32) {
+ lmb_base = reg.addr32[i].address;
+ lmb_size = reg.addr32[i].size;
+ } else {
+ lmb_base = reg.addr64[i].address;
+ lmb_size = reg.addr64[i].size;
+ }
+
+#ifdef CONFIG_MSCHUNKS
+ if ( lmb_addrs_overlap(lmb_base,lmb_size,
+ io_base,io_size) ) {
+ /* If we really have dram here, then we don't
+ * have a 630! -Peter
+ */
+ have_630 = 0;
+ }
+#endif /* CONFIG_MSCHUNKS */
+ if ( lmb_add(lmb_base, lmb_size) < 0 )
+ prom_print(RELOC("Too many LMB's, discarding this one...\n"));
+#ifdef CONFIG_MSCHUNKS
+ else if ( max_addr < (lmb_base+lmb_size-1) )
+ max_addr = lmb_base+lmb_size-1;
+#endif /* CONFIG_MSCHUNKS */
+ }
+
+ }
+
+#ifdef CONFIG_MSCHUNKS
+ if ( have_630 && lmb_addrs_overlap(0,max_addr,io_base,io_size) )
+ lmb_add_io(io_base, io_size);
+#endif /* CONFIG_MSCHUNKS */
+
+ lmb_analyze();
+#ifdef DEBUG_PROM
+ prom_dump_lmb();
+#endif /* DEBUG_PROM */
+
+#ifdef CONFIG_MSCHUNKS
+ mem = prom_initialize_mschunks(mem);
+#ifdef DEBUG_PROM
+ prom_dump_mschunks_mapping();
+#endif /* DEBUG_PROM */
+#endif /* CONFIG_MSCHUNKS */
+
+ return mem;
+}
+
+
+static unsigned long __init
+prom_instantiate_rtas(unsigned long mem)
+{
+ unsigned long offset = reloc_offset();
+ struct prom_t *_prom = PTRRELOC(&prom);
+ struct rtas_t *_rtas = PTRRELOC(&rtas);
+ struct naca_struct *_naca = RELOC(naca);
+ ihandle prom_rtas;
+ u32 getprop_rval;
+
+#ifdef DEBUG_PROM
+ prom_print(RELOC("prom_instantiate_rtas: start...\n"));
+#endif
+ prom_rtas = (ihandle)call_prom(RELOC("finddevice"), 1, 1, RELOC("/rtas"));
+ if (prom_rtas != (ihandle) -1) {
+ char hypertas_funcs[1024];
+ int rc;
+
+ if ((rc = call_prom(RELOC("getprop"),
+ 4, 1, prom_rtas,
+ RELOC("ibm,hypertas-functions"),
+ hypertas_funcs,
+ sizeof(hypertas_funcs))) > 0) {
+ _naca->platform = PLATFORM_PSERIES_LPAR;
+ }
+
+ call_prom(RELOC("getprop"),
+ 4, 1, prom_rtas,
+ RELOC("rtas-size"),
+ &getprop_rval,
+ sizeof(getprop_rval));
+ _rtas->size = getprop_rval;
+ prom_print(RELOC("instantiating rtas"));
+ if (_rtas->size != 0) {
+ /*
+ * Ask OF for some space for RTAS.
+ * Actually OF has bugs so we just arbitrarily
+ * use memory at the 6MB point.
+ */
+ // The new code...
+ mem = PAGE_ALIGN(mem);
+ _rtas->base = mem + offset - KERNELBASE;
+
+ mem += _rtas->size;
+ prom_print(RELOC(" at 0x"));
+ prom_print_hex(_rtas->base);
+
+ prom_rtas = (ihandle)call_prom(RELOC("open"),
+ 1, 1, RELOC("/rtas"));
+ prom_print(RELOC("..."));
+
+ if ((long)call_prom(RELOC("call-method"), 3, 2,
+ RELOC("instantiate-rtas"),
+ prom_rtas,
+ _rtas->base) >= 0) {
+ _rtas->entry = (long)_prom->args.rets[1];
+ }
+ }
+
+ if (_rtas->entry <= 0) {
+ prom_print(RELOC(" failed\n"));
+ } else {
+ prom_print(RELOC(" done\n"));
+ }
+
+#ifdef DEBUG_PROM
+ prom_print(RELOC("rtas->base = 0x"));
+ prom_print_hex(_rtas->base);
+ prom_print_nl();
+ prom_print(RELOC("rtas->entry = 0x"));
+ prom_print_hex(_rtas->entry);
+ prom_print_nl();
+ prom_print(RELOC("rtas->size = 0x"));
+ prom_print_hex(_rtas->size);
+ prom_print_nl();
+#endif
+ }
+#ifdef DEBUG_PROM
+ prom_print(RELOC("prom_instantiate_rtas: end...\n"));
+#endif
+
+ return mem;
+}
+
+unsigned long prom_strtoul(const char *cp)
+{
+ unsigned long result = 0,value;
+
+ while (*cp) {
+ value = *cp-'0';
+ result = result*10 + value;
+ cp++;
+ }
+
+ return result;
+}
+
+
+#ifdef CONFIG_MSCHUNKS
+static unsigned long
+prom_initialize_mschunks(unsigned long mem)
+{
+ unsigned long offset = reloc_offset();
+ struct lmb *_lmb = PTRRELOC(&lmb);
+ struct msChunks *_msChunks = PTRRELOC(&msChunks);
+ unsigned long i, pchunk = 0;
+ unsigned long addr_range = _lmb->memory.size + _lmb->memory.iosize;
+ unsigned long chunk_size = _lmb->memory.lcd_size;
+
+
+ mem = msChunks_alloc(mem, addr_range / chunk_size, chunk_size);
+
+ /* First create phys -> abs mapping for memory/dram */
+ for (i=0; i < _lmb->memory.cnt ;i++) {
+ unsigned long base = _lmb->memory.region[i].base;
+ unsigned long size = _lmb->memory.region[i].size;
+ unsigned long achunk = addr_to_chunk(base);
+ unsigned long end_achunk = addr_to_chunk(base+size);
+
+ if(_lmb->memory.region[i].type != LMB_MEMORY_AREA)
+ continue;
+
+ _lmb->memory.region[i].physbase = chunk_to_addr(pchunk);
+ for (; achunk < end_achunk ;) {
+ PTRRELOC(_msChunks->abs)[pchunk++] = achunk++;
+ }
+ }
+
+#ifdef CONFIG_MSCHUNKS
+ /* Now create phys -> abs mapping for IO */
+ for (i=0; i < _lmb->memory.cnt ;i++) {
+ unsigned long base = _lmb->memory.region[i].base;
+ unsigned long size = _lmb->memory.region[i].size;
+ unsigned long achunk = addr_to_chunk(base);
+ unsigned long end_achunk = addr_to_chunk(base+size);
+
+ if(_lmb->memory.region[i].type != LMB_IO_AREA)
+ continue;
+
+ _lmb->memory.region[i].physbase = chunk_to_addr(pchunk);
+ for (; achunk < end_achunk ;) {
+ PTRRELOC(_msChunks->abs)[pchunk++] = achunk++;
+ }
+ }
+#endif /* CONFIG_MSCHUNKS */
+
+ return mem;
+}
+
+#ifdef DEBUG_PROM
+void
+prom_dump_mschunks_mapping(void)
+{
+ unsigned long offset = reloc_offset();
+ struct msChunks *_msChunks = PTRRELOC(&msChunks);
+ unsigned long chunk;
+
+ prom_print(RELOC("\nprom_dump_mschunks_mapping:\n"));
+ prom_print(RELOC(" msChunks.num_chunks = 0x"));
+ prom_print_hex(_msChunks->num_chunks);
+ prom_print_nl();
+ prom_print(RELOC(" msChunks.chunk_size = 0x"));
+ prom_print_hex(_msChunks->chunk_size);
+ prom_print_nl();
+ prom_print(RELOC(" msChunks.chunk_shift = 0x"));
+ prom_print_hex(_msChunks->chunk_shift);
+ prom_print_nl();
+ prom_print(RELOC(" msChunks.chunk_mask = 0x"));
+ prom_print_hex(_msChunks->chunk_mask);
+ prom_print_nl();
+ prom_print(RELOC(" msChunks.abs = 0x"));
+ prom_print_hex(_msChunks->abs);
+ prom_print_nl();
+
+ prom_print(RELOC(" msChunks mapping:\n"));
+ for(chunk=0; chunk < _msChunks->num_chunks ;chunk++) {
+ prom_print(RELOC(" phys 0x"));
+ prom_print_hex(chunk);
+ prom_print(RELOC(" -> abs 0x"));
+ prom_print_hex(PTRRELOC(_msChunks->abs)[chunk]);
+ prom_print_nl();
+ }
+
+}
+#endif /* DEBUG_PROM */
+#endif /* CONFIG_MSCHUNKS */
+
+#ifdef DEBUG_PROM
+void
+prom_dump_lmb(void)
+{
+ unsigned long i;
+ unsigned long offset = reloc_offset();
+ struct lmb *_lmb = PTRRELOC(&lmb);
+
+ prom_print(RELOC("\nprom_dump_lmb:\n"));
+ prom_print(RELOC(" memory.cnt = 0x"));
+ prom_print_hex(_lmb->memory.cnt);
+ prom_print_nl();
+ prom_print(RELOC(" memory.size = 0x"));
+ prom_print_hex(_lmb->memory.size);
+ prom_print_nl();
+ prom_print(RELOC(" memory.lcd_size = 0x"));
+ prom_print_hex(_lmb->memory.lcd_size);
+ prom_print_nl();
+ for (i=0; i < _lmb->memory.cnt ;i++) {
+ prom_print(RELOC(" memory.region[0x"));
+ prom_print_hex(i);
+ prom_print(RELOC("].base = 0x"));
+ prom_print_hex(_lmb->memory.region[i].base);
+ prom_print_nl();
+ prom_print(RELOC(" .physbase = 0x"));
+ prom_print_hex(_lmb->memory.region[i].physbase);
+ prom_print_nl();
+ prom_print(RELOC(" .size = 0x"));
+ prom_print_hex(_lmb->memory.region[i].size);
+ prom_print_nl();
+ prom_print(RELOC(" .type = 0x"));
+ prom_print_hex(_lmb->memory.region[i].type);
+ prom_print_nl();
+ }
+
+ prom_print_nl();
+ prom_print(RELOC(" reserved.cnt = 0x"));
+ prom_print_hex(_lmb->reserved.cnt);
+ prom_print_nl();
+ prom_print(RELOC(" reserved.size = 0x"));
+ prom_print_hex(_lmb->reserved.size);
+ prom_print_nl();
+ prom_print(RELOC(" reserved.lcd_size = 0x"));
+ prom_print_hex(_lmb->reserved.lcd_size);
+ prom_print_nl();
+ for (i=0; i < _lmb->reserved.cnt ;i++) {
+ prom_print(RELOC(" reserved.region[0x"));
+ prom_print_hex(i);
+ prom_print(RELOC("].base = 0x"));
+ prom_print_hex(_lmb->reserved.region[i].base);
+ prom_print_nl();
+ prom_print(RELOC(" .physbase = 0x"));
+ prom_print_hex(_lmb->reserved.region[i].physbase);
+ prom_print_nl();
+ prom_print(RELOC(" .size = 0x"));
+ prom_print_hex(_lmb->reserved.region[i].size);
+ prom_print_nl();
+ prom_print(RELOC(" .type = 0x"));
+ prom_print_hex(_lmb->reserved.region[i].type);
+ prom_print_nl();
+ }
+}
+#endif /* DEBUG_PROM */
+
+
+void
+prom_initialize_tce_table(void)
+{
+ phandle node;
+ ihandle phb_node;
+ unsigned long offset = reloc_offset();
+ char compatible[64], path[64], type[64], model[64];
+ unsigned long i, table = 0;
+ unsigned long base, vbase, align;
+ unsigned int minalign, minsize;
+ struct _of_tce_table *prom_tce_table = RELOC(of_tce_table);
+ unsigned long tce_entry, *tce_entryp;
+
+#ifdef DEBUG_PROM
+ prom_print(RELOC("starting prom_initialize_tce_table\n"));
+#endif
+
+ /* Search all nodes looking for PHBs. */
+ for (node = 0; prom_next_node(&node); ) {
+ compatible[0] = 0;
+ type[0] = 0;
+ model[0] = 0;
+ call_prom(RELOC("getprop"), 4, 1, node, RELOC("compatible"),
+ compatible, sizeof(compatible));
+ call_prom(RELOC("getprop"), 4, 1, node, RELOC("device_type"),
+ type, sizeof(type));
+ call_prom(RELOC("getprop"), 4, 1, node, RELOC("model"),
+ model, sizeof(model));
+
+ /* Keep the old logic in tack to avoid regression. */
+ if (compatible[0] != 0) {
+ if((strstr(compatible, RELOC("python")) == NULL) &&
+ (strstr(compatible, RELOC("Speedwagon")) == NULL) &&
+ (strstr(compatible, RELOC("Winnipeg")) == NULL))
+ continue;
+ } else if (model[0] != 0) {
+ if ((strstr(model, RELOC("ython")) == NULL) &&
+ (strstr(model, RELOC("peedwagon")) == NULL) &&
+ (strstr(model, RELOC("innipeg")) == NULL))
+ continue;
+ } else {
+ prom_print(RELOC("No known I/O bridge chip found.\n"));
+ }
+
+ if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL)) {
+ continue;
+ }
+
+ if (call_prom(RELOC("getprop"), 4, 1, node,
+ RELOC("tce-table-minalign"), &minalign,
+ sizeof(minalign)) < 0) {
+ minalign = 0;
+ }
+
+ if (call_prom(RELOC("getprop"), 4, 1, node,
+ RELOC("tce-table-minsize"), &minsize,
+ sizeof(minsize)) < 0) {
+ minsize = 4UL << 20;
+ }
+
+ /* Even though we read what OF wants, we just set the table
+ * size to 4 MB. This is enough to map 2GB of PCI DMA space.
+ * By doing this, we avoid the pitfalls of trying to DMA to
+ * MMIO space and the DMA alias hole.
+ */
+ minsize = 4UL << 20;
+
+ /* Align to the greater of the align or size */
+ align = (minalign < minsize) ? minsize : minalign;
+
+ /* Carve out storage for the TCE table. */
+ base = lmb_alloc(minsize, align);
+
+ if ( !base ) {
+ prom_print(RELOC("ERROR, cannot find space for TCE table.\n"));
+ prom_exit();
+ }
+
+ vbase = absolute_to_virt(base);
+
+ /* Save away the TCE table attributes for later use. */
+ prom_tce_table[table].node = node;
+ prom_tce_table[table].base = vbase;
+ prom_tce_table[table].size = minsize;
+
+#ifdef DEBUG_PROM
+ prom_print(RELOC("TCE table: 0x"));
+ prom_print_hex(table);
+ prom_print_nl();
+
+ prom_print(RELOC("\tnode = 0x"));
+ prom_print_hex(node);
+ prom_print_nl();
+
+ prom_print(RELOC("\tbase = 0x"));
+ prom_print_hex(vbase);
+ prom_print_nl();
+
+ prom_print(RELOC("\tsize = 0x"));
+ prom_print_hex(minsize);
+ prom_print_nl();
+#endif
+
+ /* Initialize the table to have a one-to-one mapping
+ * over the allocated size.
+ */
+ tce_entryp = (unsigned long *)base;
+ for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
+ tce_entry = (i << PAGE_SHIFT);
+ tce_entry |= 0x3;
+ *tce_entryp = tce_entry;
+ }
+
+ /* Call OF to setup the TCE hardware */
+ if (call_prom(RELOC("package-to-path"), 3, 1, node,
+ path, 255) <= 0) {
+ prom_print(RELOC("package-to-path failed\n"));
+ } else {
+ prom_print(RELOC("opened "));
+ prom_print(path);
+ prom_print_nl();
+ }
+
+ phb_node = (ihandle)call_prom(RELOC("open"), 1, 1, path);
+ if ( (long)phb_node <= 0) {
+ prom_print(RELOC("open failed\n"));
+ } else {
+ prom_print(RELOC("open success\n"));
+ }
+ call_prom(RELOC("call-method"), 6, 0,
+ RELOC("set-64-bit-addressing"),
+ phb_node,
+ -1,
+ minsize,
+ base & 0xffffffff,
+ (base >> 32) & 0xffffffff);
+ call_prom(RELOC("close"), 1, 0, phb_node);
+
+ table++;
+ }
+
+ /* Flag the first invalid entry */
+ prom_tce_table[table].node = 0;
+#ifdef DEBUG_PROM
+ prom_print(RELOC("ending prom_initialize_tce_table\n"));
+#endif
+}
+
+/*
+ * With CHRP SMP we need to use the OF to start the other
+ * processors so we can't wait until smp_boot_cpus (the OF is
+ * trashed by then) so we have to put the processors into
+ * a holding pattern controlled by the kernel (not OF) before
+ * we destroy the OF.
+ *
+ * This uses a chunk of low memory, puts some holding pattern
+ * code there and sends the other processors off to there until
+ * smp_boot_cpus tells them to do something. The holding pattern
+ * checks that address until its cpu # is there, when it is that
+ * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
+ * of setting those values.
+ *
+ * We also use physical address 0x4 here to tell when a cpu
+ * is in its holding pattern code.
+ *
+ * Fixup comment... DRENG / PPPBBB - Peter
+ *
+ * -- Cort
+ */
+static void
+prom_hold_cpus(unsigned long mem)
+{
+ unsigned long i;
+ unsigned int reg;
+ phandle node;
+ unsigned long offset = reloc_offset();
+ char type[64], *path;
+ int cpuid = 0;
+ extern void __secondary_hold(void);
+ extern unsigned long __secondary_hold_spinloop;
+ extern unsigned long __secondary_hold_acknowledge;
+ unsigned long *spinloop = __v2a(&__secondary_hold_spinloop);
+ unsigned long *acknowledge = __v2a(&__secondary_hold_acknowledge);
+ unsigned long secondary_hold = (unsigned long)__v2a(*PTRRELOC((unsigned long *)__secondary_hold));
+ struct naca_struct *_naca = RELOC(naca);
+ struct paca_struct *_xPaca = PTRRELOC(&paca[0]);
+ struct prom_t *_prom = PTRRELOC(&prom);
+
+ /* Initially, we must have one active CPU. */
+ _naca->processorCount = 1;
+
+#ifdef DEBUG_PROM
+ prom_print(RELOC("prom_hold_cpus: start...\n"));
+ prom_print(RELOC(" 1) spinloop = 0x"));
+ prom_print_hex(spinloop);
+ prom_print_nl();
+ prom_print(RELOC(" 1) *spinloop = 0x"));
+ prom_print_hex(*spinloop);
+ prom_print_nl();
+ prom_print(RELOC(" 1) acknowledge = 0x"));
+ prom_print_hex(acknowledge);
+ prom_print_nl();
+ prom_print(RELOC(" 1) *acknowledge = 0x"));
+ prom_print_hex(*acknowledge);
+ prom_print_nl();
+ prom_print(RELOC(" 1) secondary_hold = 0x"));
+ prom_print_hex(secondary_hold);
+ prom_print_nl();
+#endif
+
+ /* Set the common spinloop variable, so all of the secondary cpus
+ * will block when they are awakened from their OF spinloop.
+ * This must occur for both SMP and non SMP kernels, since OF will
+ * be trashed when we move the kernel.
+ */
+ *spinloop = 0;
+
+#ifdef CONFIG_HMT
+ for (i=0; i < NR_CPUS; i++) {
+ RELOC(hmt_thread_data)[i].pir = 0xdeadbeef;
+ }
+#endif
+ /* look for cpus */
+ for (node = 0; prom_next_node(&node); ) {
+ type[0] = 0;
+ call_prom(RELOC("getprop"), 4, 1, node, RELOC("device_type"),
+ type, sizeof(type));
+ if (strcmp(type, RELOC("cpu")) != 0)
+ continue;
+
+ /* Skip non-configured cpus. */
+ call_prom(RELOC("getprop"), 4, 1, node, RELOC("status"),
+ type, sizeof(type));
+ if (strcmp(type, RELOC("okay")) != 0)
+ continue;
+
+ reg = -1;
+ call_prom(RELOC("getprop"), 4, 1, node, RELOC("reg"),
+ ®, sizeof(reg));
+
+ /* Only need to start secondary procs, not ourself. */
+ if ( reg == _prom->cpu )
+ continue;
+
+ path = (char *) mem;
+ memset(path, 0, 256);
+ if ((long) call_prom(RELOC("package-to-path"), 3, 1,
+ node, path, 255) < 0)
+ continue;
+
+ cpuid++;
+
+#ifdef DEBUG_PROM
+ prom_print_nl();
+ prom_print(RELOC("cpuid = 0x"));
+ prom_print_hex(cpuid);
+ prom_print_nl();
+ prom_print(RELOC("cpu hw idx = 0x"));
+ prom_print_hex(reg);
+ prom_print_nl();
+#endif
+ _xPaca[cpuid].xHwProcNum = reg;
+
+ prom_print(RELOC("starting cpu "));
+ prom_print(path);
+
+ /* Init the acknowledge var which will be reset by
+ * the secondary cpu when it awakens from its OF
+ * spinloop.
+ */
+ *acknowledge = (unsigned long)-1;
+
+#ifdef DEBUG_PROM
+ prom_print(RELOC(" 3) spinloop = 0x"));
+ prom_print_hex(spinloop);
+ prom_print_nl();
+ prom_print(RELOC(" 3) *spinloop = 0x"));
+ prom_print_hex(*spinloop);
+ prom_print_nl();
+ prom_print(RELOC(" 3) acknowledge = 0x"));
+ prom_print_hex(acknowledge);
+ prom_print_nl();
+ prom_print(RELOC(" 3) *acknowledge = 0x"));
+ prom_print_hex(*acknowledge);
+ prom_print_nl();
+ prom_print(RELOC(" 3) secondary_hold = 0x"));
+ prom_print_hex(secondary_hold);
+ prom_print_nl();
+ prom_print(RELOC(" 3) cpuid = 0x"));
+ prom_print_hex(cpuid);
+ prom_print_nl();
+#endif
+ call_prom(RELOC("start-cpu"), 3, 0, node, secondary_hold, cpuid);
+ prom_print(RELOC("..."));
+ for ( i = 0 ; (i < 100000000) &&
+ (*acknowledge == ((unsigned long)-1)); i++ ) ;
+#ifdef DEBUG_PROM
+ {
+ unsigned long *p = 0x0;
+ prom_print(RELOC(" 4) 0x0 = 0x"));
+ prom_print_hex(*p);
+ prom_print_nl();
+ }
+#endif
+ if (*acknowledge == cpuid) {
+ prom_print(RELOC("ok\n"));
+ /* Set the number of active processors. */
+ _naca->processorCount++;
+ } else {
+ prom_print(RELOC("failed: "));
+ prom_print_hex(*acknowledge);
+ prom_print_nl();
+ }
+ }
+#ifdef CONFIG_HMT
+ /* Only enable HMT on processors that provide support. */
+ if (__is_processor(PV_PULSAR) ||
+ __is_processor(PV_ICESTAR) ||
+ __is_processor(PV_SSTAR)) {
+ prom_print(RELOC(" starting secondary threads\n"));
+
+ for (i=0; i < _naca->processorCount ;i++) {
+ unsigned long threadid = _naca->processorCount*2-1-i;
+
+ if (i == 0) {
+ unsigned long pir = _get_PIR();
+ if (__is_processor(PV_PULSAR)) {
+ RELOC(hmt_thread_data)[i].pir =
+ pir & 0x1f;
+ } else {
+ RELOC(hmt_thread_data)[i].pir =
+ pir & 0x3ff;
+ }
+ }
+
+ RELOC(hmt_thread_data)[i].threadid = threadid;
+#ifdef DEBUG_PROM
+ prom_print(RELOC(" cpuid 0x"));
+ prom_print_hex(i);
+ prom_print(RELOC(" maps to threadid 0x"));
+ prom_print_hex(threadid);
+ prom_print_nl();
+ prom_print(RELOC(" pir 0x"));
+ prom_print_hex(RELOC(hmt_thread_data)[i].pir);
+ prom_print_nl();
+#endif
+ _xPaca[threadid].xHwProcNum = _xPaca[i].xHwProcNum+1;
+ }
+ _naca->processorCount *= 2;
+ } else {
+ prom_print(RELOC("Processor is not HMT capable\n"));
+ }
+#endif
+
+#ifdef DEBUG_PROM
+ prom_print(RELOC("prom_hold_cpus: end...\n"));
+#endif
+}
+
+
+/*
+ * We enter here early on, when the Open Firmware prom is still
+ * handling exceptions and the MMU hash table for us.
+ */
+
+unsigned long __init
+prom_init(unsigned long r3, unsigned long r4, unsigned long pp,
+ unsigned long r6, unsigned long r7, yaboot_debug_t *yaboot)
+{
+ int chrp = 0;
+ unsigned long mem;
+ ihandle prom_mmu, prom_op, prom_root, prom_cpu;
+ phandle cpu_pkg;
+ unsigned long offset = reloc_offset();
+ long l;
+ char *p, *d;
+ unsigned long phys;
+ u32 getprop_rval;
+ struct naca_struct *_naca = RELOC(naca);
+ struct paca_struct *_xPaca = PTRRELOC(&paca[0]);
+ struct prom_t *_prom = PTRRELOC(&prom);
+
+ /* Default machine type. */
+ _naca->platform = PLATFORM_PSERIES;
+ /* Reset klimit to take into account the embedded system map */
+ if (RELOC(embedded_sysmap_end))
+ RELOC(klimit) = __va(PAGE_ALIGN(RELOC(embedded_sysmap_end)));
+
+ /* Get a handle to the prom entry point before anything else */
+ _prom->entry = pp;
+ _prom->bi_recs = prom_bi_rec_verify((struct bi_record *)r6);
+ if ( _prom->bi_recs != NULL ) {
+ RELOC(klimit) = PTRUNRELOC((unsigned long)_prom->bi_recs + _prom->bi_recs->data[1]);
+ }
+
+#ifdef DEBUG_YABOOT
+ call_yaboot(yaboot->dummy,offset>>32,offset&0xffffffff);
+ call_yaboot(yaboot->printf, RELOC("offset = 0x%08x%08x\n"), LONG_MSW(offset), LONG_LSW(offset));
+#endif
+
+ /* Default */
+ phys = KERNELBASE - offset;
+
+#ifdef DEBUG_YABOOT
+ call_yaboot(yaboot->printf, RELOC("phys = 0x%08x%08x\n"), LONG_MSW(phys), LONG_LSW(phys));
+#endif
+
+
+#ifdef DEBUG_YABOOT
+ _prom->yaboot = yaboot;
+ call_yaboot(yaboot->printf, RELOC("pp = 0x%08x%08x\n"), LONG_MSW(pp), LONG_LSW(pp));
+ call_yaboot(yaboot->printf, RELOC("prom = 0x%08x%08x\n"), LONG_MSW(_prom->entry), LONG_LSW(_prom->entry));
+#endif
+
+ /* First get a handle for the stdout device */
+ _prom->chosen = (ihandle)call_prom(RELOC("finddevice"), 1, 1,
+ RELOC("/chosen"));
+
+#ifdef DEBUG_YABOOT
+ call_yaboot(yaboot->printf, RELOC("prom->chosen = 0x%08x%08x\n"), LONG_MSW(_prom->chosen), LONG_LSW(_prom->chosen));
+#endif
+
+ if ((long)_prom->chosen <= 0)
+ prom_exit();
+
+ if ((long)call_prom(RELOC("getprop"), 4, 1, _prom->chosen,
+ RELOC("stdout"), &getprop_rval,
+ sizeof(getprop_rval)) <= 0)
+ prom_exit();
+
+ _prom->stdout = (ihandle)(unsigned long)getprop_rval;
+
+#ifdef DEBUG_YABOOT
+ if (_prom->stdout == 0) {
+ call_yaboot(yaboot->printf, RELOC("prom->stdout = 0x%08x%08x\n"), LONG_MSW(_prom->stdout), LONG_LSW(_prom->stdout));
+ }
+
+ call_yaboot(yaboot->printf, RELOC("prom->stdout = 0x%08x%08x\n"), LONG_MSW(_prom->stdout), LONG_LSW(_prom->stdout));
+#endif
+
+#ifdef DEBUG_YABOOT
+ call_yaboot(yaboot->printf, RELOC("Location: 0x11\n"));
+#endif
+
+ mem = RELOC(klimit) - offset;
+#ifdef DEBUG_YABOOT
+ call_yaboot(yaboot->printf, RELOC("Location: 0x11b\n"));
+#endif
+
+ /* Get the full OF pathname of the stdout device */
+ p = (char *) mem;
+ memset(p, 0, 256);
+ call_prom(RELOC("instance-to-path"), 3, 1, _prom->stdout, p, 255);
+ RELOC(of_stdout_device) = PTRUNRELOC(p);
+ mem += strlen(p) + 1;
+
+ getprop_rval = 1;
+ prom_root = (ihandle)call_prom(RELOC("finddevice"), 1, 1, RELOC("/"));
+ if (prom_root != (ihandle)-1) {
+ call_prom(RELOC("getprop"), 4, 1,
+ prom_root, RELOC("#size-cells"),
+ &getprop_rval, sizeof(getprop_rval));
+ }
+ _prom->encode_phys_size = (getprop_rval==1) ? 32 : 64;
+
+#ifdef DEBUG_PROM
+ prom_print(RELOC("DRENG: Detect OF version...\n"));
+#endif
+ /* Find the OF version */
+ prom_op = (ihandle)call_prom(RELOC("finddevice"), 1, 1, RELOC("/openprom"));
+ if (prom_op != (ihandle)-1) {
+ char model[64];
+ long sz;
+ sz = (long)call_prom(RELOC("getprop"), 4, 1, prom_op,
+ RELOC("model"), model, 64);
+ if (sz > 0) {
+ char *c;
+ /* hack to skip the ibm chrp firmware # */
+ if ( strncmp(model,RELOC("IBM"),3) ) {
+ for (c = model; *c; c++)
+ if (*c >= '0' && *c <= '9') {
+ _prom->version = *c - '0';
+ break;
+ }
+ }
+ else
+ chrp = 1;
+ }
+ }
+ if (_prom->version >= 3)
+ prom_print(RELOC("OF Version 3 detected.\n"));
+
+
+ /* Determine which cpu is actually running right _now_ */
+ if ((long)call_prom(RELOC("getprop"), 4, 1, _prom->chosen,
+ RELOC("cpu"), &getprop_rval,
+ sizeof(getprop_rval)) <= 0)
+ prom_exit();
+
+ prom_cpu = (ihandle)(unsigned long)getprop_rval;
+ cpu_pkg = call_prom(RELOC("instance-to-package"), 1, 1, prom_cpu);
+ call_prom(RELOC("getprop"), 4, 1,
+ cpu_pkg, RELOC("reg"),
+ &getprop_rval, sizeof(getprop_rval));
+ _prom->cpu = (int)(unsigned long)getprop_rval;
+ _xPaca[0].xHwProcNum = _prom->cpu;
+
+#ifdef DEBUG_PROM
+ prom_print(RELOC("Booting CPU hw index = 0x"));
+ prom_print_hex(_prom->cpu);
+ prom_print_nl();
+#endif
+
+ /* Get the boot device and translate it to a full OF pathname. */
+ p = (char *) mem;
+ l = (long) call_prom(RELOC("getprop"), 4, 1, _prom->chosen,
+ RELOC("bootpath"), p, 1<<20);
+ if (l > 0) {
+ p[l] = 0; /* should already be null-terminated */
+ RELOC(bootpath) = PTRUNRELOC(p);
+ mem += l + 1;
+ d = (char *) mem;
+ *d = 0;
+ call_prom(RELOC("canon"), 3, 1, p, d, 1<<20);
+ RELOC(bootdevice) = PTRUNRELOC(d);
+ mem = DOUBLEWORD_ALIGN(mem + strlen(d) + 1);
+ }
+
+ mem = prom_initialize_lmb(mem);
+
+ mem = prom_bi_rec_reserve(mem);
+
+ mem = prom_instantiate_rtas(mem);
+
+ /* Initialize some system info into the Naca early... */
+ mem = prom_initialize_naca(mem);
+
+ /* If we are on an SMP machine, then we *MUST* do the
+ * following, regardless of whether we have an SMP
+ * kernel or not.
+ */
+ if ( _naca->processorCount > 1 )
+ prom_hold_cpus(mem);
+
+ mem = check_display(mem);
+
+#ifdef DEBUG_PROM
+ prom_print(RELOC("copying OF device tree...\n"));
+#endif
+ mem = copy_device_tree(mem);
+
+ RELOC(klimit) = mem + offset;
+
+ lmb_reserve(0, __pa(RELOC(klimit)));
+
+ if (_naca->platform == PLATFORM_PSERIES)
+ prom_initialize_tce_table();
+
+ if ((long) call_prom(RELOC("getprop"), 4, 1,
+ _prom->chosen,
+ RELOC("mmu"),
+ &getprop_rval,
+ sizeof(getprop_rval)) <= 0) {
+ prom_print(RELOC(" no MMU found\n"));
+ prom_exit();
+ }
+
+ /* We assume the phys. address size is 3 cells */
+ RELOC(prom_mmu) = (ihandle)(unsigned long)getprop_rval;
+
+ if ((long)call_prom(RELOC("call-method"), 4, 4,
+ RELOC("translate"),
+ prom_mmu,
+ (void *)(KERNELBASE - offset),
+ (void *)1) != 0) {
+ prom_print(RELOC(" (translate failed) "));
+ } else {
+ prom_print(RELOC(" (translate ok) "));
+ phys = (unsigned long)_prom->args.rets[3];
+ }
+
+ /* If OpenFirmware version >= 3, then use quiesce call */
+ if (_prom->version >= 3) {
+ prom_print(RELOC("Calling quiesce ...\n"));
+ call_prom(RELOC("quiesce"), 0, 0);
+ phys = KERNELBASE - offset;
+ }
+
+ prom_print(RELOC("returning from prom_init\n"));
+ return phys;
+}
+
+
+static int
+prom_set_color(ihandle ih, int i, int r, int g, int b)
+{
+ unsigned long offset = reloc_offset();
+
+ return (int)(long)call_prom(RELOC("call-method"), 6, 1,
+ RELOC("color!"),
+ ih,
+ (void *)(long) i,
+ (void *)(long) b,
+ (void *)(long) g,
+ (void *)(long) r );
+}
+
+/*
+ * If we have a display that we don't know how to drive,
+ * we will want to try to execute OF's open method for it
+ * later. However, OF will probably fall over if we do that
+ * we've taken over the MMU.
+ * So we check whether we will need to open the display,
+ * and if so, open it now.
+ */
+static unsigned long __init
+check_display(unsigned long mem)
+{
+ phandle node;
+ ihandle ih;
+ int i;
+ unsigned long offset = reloc_offset();
+ struct prom_t *_prom = PTRRELOC(&prom);
+ char type[64], *path;
+ static unsigned char default_colors[] = {
+ 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0xaa,
+ 0x00, 0xaa, 0x00,
+ 0x00, 0xaa, 0xaa,
+ 0xaa, 0x00, 0x00,
+ 0xaa, 0x00, 0xaa,
+ 0xaa, 0xaa, 0x00,
+ 0xaa, 0xaa, 0xaa,
+ 0x55, 0x55, 0x55,
+ 0x55, 0x55, 0xff,
+ 0x55, 0xff, 0x55,
+ 0x55, 0xff, 0xff,
+ 0xff, 0x55, 0x55,
+ 0xff, 0x55, 0xff,
+ 0xff, 0xff, 0x55,
+ 0xff, 0xff, 0xff
+ };
+
+ _prom->disp_node = 0;
+
+ for (node = 0; prom_next_node(&node); ) {
+ type[0] = 0;
+ call_prom(RELOC("getprop"), 4, 1, node, RELOC("device_type"),
+ type, sizeof(type));
+ if (strcmp(type, RELOC("display")) != 0)
+ continue;
+ /* It seems OF doesn't null-terminate the path :-( */
+ path = (char *) mem;
+ memset(path, 0, 256);
+ if ((long) call_prom(RELOC("package-to-path"), 3, 1,
+ node, path, 255) < 0)
+ continue;
+ prom_print(RELOC("opening display "));
+ prom_print(path);
+ ih = (ihandle)call_prom(RELOC("open"), 1, 1, path);
+ if (ih == (ihandle)0 || ih == (ihandle)-1) {
+ prom_print(RELOC("... failed\n"));
+ continue;
+ }
+ prom_print(RELOC("... ok\n"));
+
+ if (_prom->disp_node == 0)
+ _prom->disp_node = (ihandle)(unsigned long)node;
+
+ /* Setup a useable color table when the appropriate
+ * method is available. Should update this to set-colors */
+ for (i = 0; i < 32; i++)
+ if (prom_set_color(ih, i, RELOC(default_colors)[i*3],
+ RELOC(default_colors)[i*3+1],
+ RELOC(default_colors)[i*3+2]) != 0)
+ break;
+
+#ifdef CONFIG_FB
+ for (i = 0; i < LINUX_LOGO_COLORS; i++)
+ if (prom_set_color(ih, i + 32,
+ RELOC(linux_logo_red)[i],
+ RELOC(linux_logo_green)[i],
+ RELOC(linux_logo_blue)[i]) != 0)
+ break;
+#endif /* CONFIG_FB */
+
+ /*
+ * If this display is the device that OF is using for stdout,
+ * move it to the front of the list.
+ */
+ mem += strlen(path) + 1;
+ i = RELOC(prom_num_displays)++;
+ if (RELOC(of_stdout_device) != 0 && i > 0
+ && strcmp(PTRRELOC(RELOC(of_stdout_device)), path) == 0) {
+ for (; i > 0; --i)
+ RELOC(prom_display_paths[i]) = RELOC(prom_display_paths[i-1]);
+ }
+ RELOC(prom_display_paths[i]) = PTRUNRELOC(path);
+ if (RELOC(prom_num_displays) >= FB_MAX)
+ break;
+ }
+ return DOUBLEWORD_ALIGN(mem);
+}
+
+void
+virt_irq_init(void)
+{
+ int i;
+ for (i = 0; i < NR_IRQS; i++)
+ virt_irq_to_real_map[i] = UNDEFINED_IRQ;
+ for (i = 0; i < NR_HW_IRQS; i++)
+ real_irq_to_virt_map[i] = UNDEFINED_IRQ;
+}
+
+/* Create a mapping for a real_irq if it doesn't already exist.
+ * Return the virtual irq as a convenience.
+ */
+unsigned long
+virt_irq_create_mapping(unsigned long real_irq)
+{
+ unsigned long virq;
+ if (naca->interrupt_controller == IC_OPEN_PIC)
+ return real_irq; /* no mapping for openpic (for now) */
+ virq = real_irq_to_virt(real_irq);
+ if (virq == UNDEFINED_IRQ) {
+ /* Assign a virtual IRQ number */
+ if (real_irq < NR_IRQS && virt_irq_to_real(real_irq) == UNDEFINED_IRQ) {
+ /* A 1-1 mapping will work. */
+ virq = real_irq;
+ } else {
+ while (last_virt_irq < NR_IRQS &&
+ virt_irq_to_real(++last_virt_irq) != UNDEFINED_IRQ)
+ /* skip irq's in use */;
+ if (last_virt_irq >= NR_IRQS)
+ panic("Too many IRQs are required on this system. NR_IRQS=%d\n", NR_IRQS);
+ virq = last_virt_irq;
+ }
+ virt_irq_to_real_map[virq] = real_irq;
+ real_irq_to_virt_map[real_irq] = virq;
+ }
+ return virq;
+}
+
+
+static int __init
+prom_next_node(phandle *nodep)
+{
+ phandle node;
+ unsigned long offset = reloc_offset();
+
+ if ((node = *nodep) != 0
+ && (*nodep = call_prom(RELOC("child"), 1, 1, node)) != 0)
+ return 1;
+ if ((*nodep = call_prom(RELOC("peer"), 1, 1, node)) != 0)
+ return 1;
+ for (;;) {
+ if ((node = call_prom(RELOC("parent"), 1, 1, node)) == 0)
+ return 0;
+ if ((*nodep = call_prom(RELOC("peer"), 1, 1, node)) != 0)
+ return 1;
+ }
+}
+
+/*
+ * Make a copy of the device tree from the PROM.
+ */
+static unsigned long __init
+copy_device_tree(unsigned long mem_start)
+{
+ phandle root;
+ unsigned long new_start;
+ struct device_node **allnextp;
+ unsigned long offset = reloc_offset();
+ unsigned long mem_end = mem_start + (8<<20);
+
+ root = call_prom(RELOC("peer"), 1, 1, (phandle)0);
+ if (root == (phandle)0) {
+ prom_print(RELOC("couldn't get device tree root\n"));
+ prom_exit();
+ }
+ allnextp = &RELOC(allnodes);
+ mem_start = DOUBLEWORD_ALIGN(mem_start);
+ new_start = inspect_node(root, 0, mem_start, mem_end, &allnextp);
+ *allnextp = 0;
+ return new_start;
+}
+
+__init
+static unsigned long
+inspect_node(phandle node, struct device_node *dad,
+ unsigned long mem_start, unsigned long mem_end,
+ struct device_node ***allnextpp)
+{
+ int l;
+ phandle child;
+ struct device_node *np;
+ struct property *pp, **prev_propp;
+ char *prev_name, *namep;
+ unsigned char *valp;
+ unsigned long offset = reloc_offset();
+
+ np = (struct device_node *) mem_start;
+ mem_start += sizeof(struct device_node);
+ memset(np, 0, sizeof(*np));
+ np->node = node;
+ **allnextpp = PTRUNRELOC(np);
+ *allnextpp = &np->allnext;
+ if (dad != 0) {
+ np->parent = PTRUNRELOC(dad);
+ /* we temporarily use the `next' field as `last_child'. */
+ if (dad->next == 0)
+ dad->child = PTRUNRELOC(np);
+ else
+ dad->next->sibling = PTRUNRELOC(np);
+ dad->next = np;
+ }
+
+ /* get and store all properties */
+ prev_propp = &np->properties;
+ prev_name = RELOC("");
+ for (;;) {
+ pp = (struct property *) mem_start;
+ namep = (char *) (pp + 1);
+ pp->name = PTRUNRELOC(namep);
+ if ((long) call_prom(RELOC("nextprop"), 3, 1, node, prev_name,
+ namep) <= 0)
+ break;
+ mem_start = DOUBLEWORD_ALIGN((unsigned long)namep + strlen(namep) + 1);
+ prev_name = namep;
+ valp = (unsigned char *) mem_start;
+ pp->value = PTRUNRELOC(valp);
+ pp->length = (int)(long)
+ call_prom(RELOC("getprop"), 4, 1, node, namep,
+ valp, mem_end - mem_start);
+ if (pp->length < 0)
+ continue;
+ mem_start = DOUBLEWORD_ALIGN(mem_start + pp->length);
+ *prev_propp = PTRUNRELOC(pp);
+ prev_propp = &pp->next;
+ }
+ *prev_propp = 0;
+
+ /* get the node's full name */
+ l = (long) call_prom(RELOC("package-to-path"), 3, 1, node,
+ (char *) mem_start, mem_end - mem_start);
+ if (l >= 0) {
+ np->full_name = PTRUNRELOC((char *) mem_start);
+ *(char *)(mem_start + l) = 0;
+ mem_start = DOUBLEWORD_ALIGN(mem_start + l + 1);
+ }
+
+ /* do all our children */
+ child = call_prom(RELOC("child"), 1, 1, node);
+ while (child != (phandle)0) {
+ mem_start = inspect_node(child, np, mem_start, mem_end,
+ allnextpp);
+ child = call_prom(RELOC("peer"), 1, 1, child);
+ }
+
+ return mem_start;
+}
+
+/*
+ * finish_device_tree is called once things are running normally
+ * (i.e. with text and data mapped to the address they were linked at).
+ * It traverses the device tree and fills in the name, type,
+ * {n_}addrs and {n_}intrs fields of each node.
+ */
+void __init
+finish_device_tree(void)
+{
+ unsigned long mem = klimit;
+
+ virt_irq_init();
+
+ mem = finish_node(allnodes, mem, NULL, 0, 0);
+ dev_tree_size = mem - (unsigned long) allnodes;
+
+ mem = _ALIGN(mem, PAGE_SIZE);
+ lmb_reserve(__pa(klimit), mem-klimit);
+
+ klimit = mem;
+
+ rtas.dev = find_devices("rtas");
+}
+
+static unsigned long __init
+finish_node(struct device_node *np, unsigned long mem_start,
+ interpret_func *ifunc, int naddrc, int nsizec)
+{
+ struct device_node *child;
+ int *ip;
+
+ np->name = get_property(np, "name", 0);
+ np->type = get_property(np, "device_type", 0);
+
+ /* get the device addresses and interrupts */
+ if (ifunc != NULL) {
+ mem_start = ifunc(np, mem_start, naddrc, nsizec);
+ }
+ mem_start = finish_node_interrupts(np, mem_start);
+
+ /* Look for #address-cells and #size-cells properties. */
+ ip = (int *) get_property(np, "#address-cells", 0);
+ if (ip != NULL)
+ naddrc = *ip;
+ ip = (int *) get_property(np, "#size-cells", 0);
+ if (ip != NULL)
+ nsizec = *ip;
+
+ /* the f50 sets the name to 'display' and 'compatible' to what we
+ * expect for the name -- Cort
+ */
+ ifunc = NULL;
+ if (!strcmp(np->name, "display"))
+ np->name = get_property(np, "compatible", 0);
+
+ if (!strcmp(np->name, "device-tree") || np->parent == NULL)
+ ifunc = interpret_root_props;
+ else if (np->type == 0)
+ ifunc = NULL;
+ else if (!strcmp(np->type, "pci") || !strcmp(np->type, "vci"))
+ ifunc = interpret_pci_props;
+ else if (!strcmp(np->type, "isa"))
+ ifunc = interpret_isa_props;
+
+ for (child = np->child; child != NULL; child = child->sibling)
+ mem_start = finish_node(child, mem_start, ifunc,
+ naddrc, nsizec);
+
+ return mem_start;
+}
+
+/* This routine walks the interrupt tree for a given device node and gather
+ * all necessary informations according to the draft interrupt mapping
+ * for CHRP. The current version was only tested on Apple "Core99" machines
+ * and may not handle cascaded controllers correctly.
+ */
+__init
+static unsigned long
+finish_node_interrupts(struct device_node *np, unsigned long mem_start)
+{
+ /* Finish this node */
+ unsigned int *isizep, *asizep, *interrupts, *map, *map_mask, *reg;
+ phandle *parent, map_parent;
+ struct device_node *node, *parent_node;
+ int l, isize, ipsize, asize, map_size, regpsize;
+
+ /* Currently, we don't look at all nodes with no "interrupts" property */
+
+ interrupts = (unsigned int *)get_property(np, "interrupts", &l);
+ if (interrupts == NULL)
+ return mem_start;
+ ipsize = l>>2;
+
+ reg = (unsigned int *)get_property(np, "reg", &l);
+ regpsize = l>>2;
+
+ /* We assume default interrupt cell size is 1 (bugus ?) */
+ isize = 1;
+ node = np;
+
+ do {
+ /* We adjust the cell size if the current parent contains an #interrupt-cells
+ * property */
+ isizep = (unsigned int *)get_property(node, "#interrupt-cells", &l);
+ if (isizep)
+ isize = *isizep;
+
+ /* We don't do interrupt cascade (ISA) for now, we stop on the first
+ * controller found
+ */
+ if (get_property(node, "interrupt-controller", &l)) {
+ int i,j;
+
+ np->intrs = (struct interrupt_info *) mem_start;
+ np->n_intrs = ipsize / isize;
+ mem_start += np->n_intrs * sizeof(struct interrupt_info);
+ for (i = 0; i < np->n_intrs; ++i) {
+ np->intrs[i].line = openpic_to_irq(virt_irq_create_mapping(*interrupts++));
+ np->intrs[i].sense = 1;
+ if (isize > 1)
+ np->intrs[i].sense = *interrupts++;
+ for (j=2; j<isize; j++)
+ interrupts++;
+ }
+ return mem_start;
+ }
+ /* We lookup for an interrupt-map. This code can only handle one interrupt
+ * per device in the map. We also don't handle #address-cells in the parent
+ * I skip the pci node itself here, may not be necessary but I don't like it's
+ * reg property.
+ */
+ if (np != node)
+ map = (unsigned int *)get_property(node, "interrupt-map", &l);
+ else
+ map = NULL;
+ if (map && l) {
+ int i, found, temp_isize, temp_asize;
+ map_size = l>>2;
+ map_mask = (unsigned int *)get_property(node, "interrupt-map-mask", &l);
+ asizep = (unsigned int *)get_property(node, "#address-cells", &l);
+ if (asizep && l == sizeof(unsigned int))
+ asize = *asizep;
+ else
+ asize = 0;
+ found = 0;
+ while (map_size>0 && !found) {
+ found = 1;
+ for (i=0; i<asize; i++) {
+ unsigned int mask = map_mask ? map_mask[i] : 0xffffffff;
+ if (!reg || (i>=regpsize) || ((mask & *map) != (mask & reg[i])))
+ found = 0;
+ map++;
+ map_size--;
+ }
+ for (i=0; i<isize; i++) {
+ unsigned int mask = map_mask ? map_mask[i+asize] : 0xffffffff;
+ if ((mask & *map) != (mask & interrupts[i]))
+ found = 0;
+ map++;
+ map_size--;
+ }
+ map_parent = *((phandle *)map);
+ map+=1; map_size-=1;
+ parent_node = find_phandle(map_parent);
+ temp_isize = isize;
+ temp_asize = 0;
+ if (parent_node) {
+ isizep = (unsigned int *)get_property(parent_node, "#interrupt-cells", &l);
+ if (isizep)
+ temp_isize = *isizep;
+ asizep = (unsigned int *)get_property(parent_node, "#address-cells", &l);
+ if (asizep && l == sizeof(unsigned int))
+ temp_asize = *asizep;
+ }
+ if (!found) {
+ map += temp_isize + temp_asize;
+ map_size -= temp_isize + temp_asize;
+ }
+ }
+ if (found) {
+ /* Mapped to a new parent. Use the reg and interrupts specified in
+ * the map as the new search parameters. Then search from the parent.
+ */
+ node = parent_node;
+ reg = map;
+ regpsize = temp_asize;
+ interrupts = map + temp_asize;
+ ipsize = temp_isize;
+ continue;
+ }
+ }
+ /* We look for an explicit interrupt-parent.
+ */
+ parent = (phandle *)get_property(node, "interrupt-parent", &l);
+ if (parent && (l == sizeof(phandle)) &&
+ (parent_node = find_phandle(*parent))) {
+ node = parent_node;
+ continue;
+ }
+ /* Default, get real parent */
+ node = node->parent;
+ } while (node);
+
+ return mem_start;
+}
+
+int
+prom_n_addr_cells(struct device_node* np)
+{
+ int* ip;
+ do {
+ if (np->parent)
+ np = np->parent;
+ ip = (int *) get_property(np, "#address-cells", 0);
+ if (ip != NULL)
+ return *ip;
+ } while (np->parent);
+ /* No #address-cells property for the root node, default to 1 */
+ return 1;
+}
+
+int
+prom_n_size_cells(struct device_node* np)
+{
+ int* ip;
+ do {
+ if (np->parent)
+ np = np->parent;
+ ip = (int *) get_property(np, "#size-cells", 0);
+ if (ip != NULL)
+ return *ip;
+ } while (np->parent);
+ /* No #size-cells property for the root node, default to 1 */
+ return 1;
+}
+
+static unsigned long __init
+interpret_pci_props(struct device_node *np, unsigned long mem_start,
+ int naddrc, int nsizec)
+{
+ struct address_range *adr;
+ struct pci_reg_property *pci_addrs;
+ int i, l;
+
+ pci_addrs = (struct pci_reg_property *)
+ get_property(np, "assigned-addresses", &l);
+ if (pci_addrs != 0 && l >= sizeof(struct pci_reg_property)) {
+ i = 0;
+ adr = (struct address_range *) mem_start;
+ while ((l -= sizeof(struct pci_reg_property)) >= 0) {
+ adr[i].space = pci_addrs[i].addr.a_hi;
+ adr[i].address = pci_addrs[i].addr.a_lo;
+ adr[i].size = pci_addrs[i].size_lo;
+ ++i;
+ }
+ np->addrs = adr;
+ np->n_addrs = i;
+ mem_start += i * sizeof(struct address_range);
+ }
+ return mem_start;
+}
+
+static unsigned long __init
+interpret_isa_props(struct device_node *np, unsigned long mem_start,
+ int naddrc, int nsizec)
+{
+ struct isa_reg_property *rp;
+ struct address_range *adr;
+ int i, l;
+
+ rp = (struct isa_reg_property *) get_property(np, "reg", &l);
+ if (rp != 0 && l >= sizeof(struct isa_reg_property)) {
+ i = 0;
+ adr = (struct address_range *) mem_start;
+ while ((l -= sizeof(struct reg_property)) >= 0) {
+ adr[i].space = rp[i].space;
+ adr[i].address = rp[i].address
+ + (adr[i].space? 0: _ISA_MEM_BASE);
+ adr[i].size = rp[i].size;
+ ++i;
+ }
+ np->addrs = adr;
+ np->n_addrs = i;
+ mem_start += i * sizeof(struct address_range);
+ }
+
+ return mem_start;
+}
+
+static unsigned long __init
+interpret_root_props(struct device_node *np, unsigned long mem_start,
+ int naddrc, int nsizec)
+{
+ struct address_range *adr;
+ int i, l;
+ unsigned int *rp;
+ int rpsize = (naddrc + nsizec) * sizeof(unsigned int);
+
+ rp = (unsigned int *) get_property(np, "reg", &l);
+ if (rp != 0 && l >= rpsize) {
+ i = 0;
+ adr = (struct address_range *) mem_start;
+ while ((l -= rpsize) >= 0) {
+ adr[i].space = 0;
+ adr[i].address = rp[naddrc - 1];
+ adr[i].size = rp[naddrc + nsizec - 1];
+ ++i;
+ rp += naddrc + nsizec;
+ }
+ np->addrs = adr;
+ np->n_addrs = i;
+ mem_start += i * sizeof(struct address_range);
+ }
+
+ return mem_start;
+}
+
+/*
+ * Work out the sense (active-low level / active-high edge)
+ * of each interrupt from the device tree.
+ */
+void __init
+prom_get_irq_senses(unsigned char *senses, int off, int max)
+{
+ struct device_node *np;
+ int i, j;
+
+ /* default to level-triggered */
+ memset(senses, 1, max - off);
+
+ for (np = allnodes; np != 0; np = np->allnext) {
+ for (j = 0; j < np->n_intrs; j++) {
+ i = np->intrs[j].line;
+ if (i >= off && i < max)
+ senses[i-off] = np->intrs[j].sense;
+ }
+ }
+}
+
+/*
+ * Construct and return a list of the device_nodes with a given name.
+ */
+struct device_node *
+find_devices(const char *name)
+{
+ struct device_node *head, **prevp, *np;
+
+ prevp = &head;
+ for (np = allnodes; np != 0; np = np->allnext) {
+ if (np->name != 0 && strcasecmp(np->name, name) == 0) {
+ *prevp = np;
+ prevp = &np->next;
+ }
+ }
+ *prevp = 0;
+ return head;
+}
+
+/*
+ * Construct and return a list of the device_nodes with a given type.
+ */
+struct device_node *
+find_type_devices(const char *type)
+{
+ struct device_node *head, **prevp, *np;
+
+ prevp = &head;
+ for (np = allnodes; np != 0; np = np->allnext) {
+ if (np->type != 0 && strcasecmp(np->type, type) == 0) {
+ *prevp = np;
+ prevp = &np->next;
+ }
+ }
+ *prevp = 0;
+ return head;
+}
+
+/*
+ * Returns all nodes linked together
+ */
+struct device_node * __openfirmware
+find_all_nodes(void)
+{
+ struct device_node *head, **prevp, *np;
+
+ prevp = &head;
+ for (np = allnodes; np != 0; np = np->allnext) {
+ *prevp = np;
+ prevp = &np->next;
+ }
+ *prevp = 0;
+ return head;
+}
+
+/* Checks if the given "compat" string matches one of the strings in
+ * the device's "compatible" property
+ */
+int
+device_is_compatible(struct device_node *device, const char *compat)
+{
+ const char* cp;
+ int cplen, l;
+
+ cp = (char *) get_property(device, "compatible", &cplen);
+ if (cp == NULL)
+ return 0;
+ while (cplen > 0) {
+ if (strncasecmp(cp, compat, strlen(compat)) == 0)
+ return 1;
+ l = strlen(cp) + 1;
+ cp += l;
+ cplen -= l;
+ }
+
+ return 0;
+}
+
+
+/*
+ * Indicates whether the root node has a given value in its
+ * compatible property.
+ */
+int
+machine_is_compatible(const char *compat)
+{
+ struct device_node *root;
+
+ root = find_path_device("/");
+ if (root == 0)
+ return 0;
+ return device_is_compatible(root, compat);
+}
+
+/*
+ * Construct and return a list of the device_nodes with a given type
+ * and compatible property.
+ */
+struct device_node *
+find_compatible_devices(const char *type, const char *compat)
+{
+ struct device_node *head, **prevp, *np;
+
+ prevp = &head;
+ for (np = allnodes; np != 0; np = np->allnext) {
+ if (type != NULL
+ && !(np->type != 0 && strcasecmp(np->type, type) == 0))
+ continue;
+ if (device_is_compatible(np, compat)) {
+ *prevp = np;
+ prevp = &np->next;
+ }
+ }
+ *prevp = 0;
+ return head;
+}
+
+/*
+ * Find the device_node with a given full_name.
+ */
+struct device_node *
+find_path_device(const char *path)
+{
+ struct device_node *np;
+
+ for (np = allnodes; np != 0; np = np->allnext)
+ if (np->full_name != 0 && strcasecmp(np->full_name, path) == 0)
+ return np;
+ return NULL;
+}
+
+/*
+ * Find the device_node with a given phandle.
+ */
+static struct device_node * __init
+find_phandle(phandle ph)
+{
+ struct device_node *np;
+
+ for (np = allnodes; np != 0; np = np->allnext)
+ if (np->node == ph)
+ return np;
+ return NULL;
+}
+
+/*
+ * Find a property with a given name for a given node
+ * and return the value.
+ */
+unsigned char *
+get_property(struct device_node *np, const char *name, int *lenp)
+{
+ struct property *pp;
+
+ for (pp = np->properties; pp != 0; pp = pp->next)
+ if (strcmp(pp->name, name) == 0) {
+ if (lenp != 0)
+ *lenp = pp->length;
+ return pp->value;
+ }
+ return 0;
+}
+
+/*
+ * Add a property to a node
+ */
+void __openfirmware
+prom_add_property(struct device_node* np, struct property* prop)
+{
+ struct property **next = &np->properties;
+
+ prop->next = NULL;
+ while (*next)
+ next = &(*next)->next;
+ *next = prop;
+}
+
+#if 0
+void __openfirmware
+print_properties(struct device_node *np)
+{
+ struct property *pp;
+ char *cp;
+ int i, n;
+
+ for (pp = np->properties; pp != 0; pp = pp->next) {
+ printk(KERN_INFO "%s", pp->name);
+ for (i = strlen(pp->name); i < 16; ++i)
+ printk(" ");
+ cp = (char *) pp->value;
+ for (i = pp->length; i > 0; --i, ++cp)
+ if ((i > 1 && (*cp < 0x20 || *cp > 0x7e))
+ || (i == 1 && *cp != 0))
+ break;
+ if (i == 0 && pp->length > 1) {
+ /* looks like a string */
+ printk(" %s\n", (char *) pp->value);
+ } else {
+ /* dump it in hex */
+ n = pp->length;
+ if (n > 64)
+ n = 64;
+ if (pp->length % 4 == 0) {
+ unsigned int *p = (unsigned int *) pp->value;
+
+ n /= 4;
+ for (i = 0; i < n; ++i) {
+ if (i != 0 && (i % 4) == 0)
+ printk("\n ");
+ printk(" %08x", *p++);
+ }
+ } else {
+ unsigned char *bp = pp->value;
+
+ for (i = 0; i < n; ++i) {
+ if (i != 0 && (i % 16) == 0)
+ printk("\n ");
+ printk(" %02x", *bp++);
+ }
+ }
+ printk("\n");
+ if (pp->length > 64)
+ printk(" ... (length = %d)\n",
+ pp->length);
+ }
+ }
+}
+#endif
+
+
+void __init
+abort()
+{
+#ifdef CONFIG_XMON
+ xmon(NULL);
+#endif
+ for (;;)
+ prom_exit();
+}
+
+
+/* Verify bi_recs are good */
+static struct bi_record *
+prom_bi_rec_verify(struct bi_record *bi_recs)
+{
+ struct bi_record *first, *last;
+
+ if ( bi_recs == NULL || bi_recs->tag != BI_FIRST )
+ return NULL;
+
+ last = (struct bi_record *)bi_recs->data[0];
+ if ( last == NULL || last->tag != BI_LAST )
+ return NULL;
+
+ first = (struct bi_record *)last->data[0];
+ if ( first == NULL || first != bi_recs )
+ return NULL;
+
+ return bi_recs;
+}
+
+static unsigned long
+prom_bi_rec_reserve(unsigned long mem)
+{
+ unsigned long offset = reloc_offset();
+ struct prom_t *_prom = PTRRELOC(&prom);
+ struct bi_record *rec;
+
+ if ( _prom->bi_recs != NULL) {
+
+ for ( rec=_prom->bi_recs;
+ rec->tag != BI_LAST;
+ rec=bi_rec_next(rec) ) {
+ switch (rec->tag) {
+#ifdef CONFIG_BLK_DEV_INITRD
+ case BI_INITRD:
+ lmb_reserve(rec->data[0], rec->data[1]);
+ break;
+#endif /* CONFIG_BLK_DEV_INITRD */
+ }
+ }
+ /* The next use of this field will be after relocation
+ * is enabled, so convert this physical address into a
+ * virtual address.
+ */
+ _prom->bi_recs = PTRUNRELOC(_prom->bi_recs);
+ }
+
+ return mem;
+}
+
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)