[PATCH] powerpc: Add back support for booting from BootX (#2)
ARCH=powerpc couldn't boot from BootX as it uses a "different" way of getting in the kernel. This patch adds the necessary trampolines, creating a flattened device-tree from the tree passed from MacOS, and initializing the btext engine early for really-early debugging. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt
Paul Mackerras
Родитель
51d3082fe6
Коммит
d7f3945420
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@ -125,6 +125,19 @@ __start:
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bl prom_init
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bl prom_init
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trap
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trap
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/*
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* Check for BootX signature when supporting PowerMac and branch to
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* appropriate trampoline if it's present
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*/
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#ifdef CONFIG_PPC_PMAC
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1: lis r31,0x426f
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ori r31,r31,0x6f58
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cmpw 0,r3,r31
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bne 1f
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bl bootx_init
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trap
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#endif /* CONFIG_PPC_PMAC */
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1: mr r31,r3 /* save parameters */
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1: mr r31,r3 /* save parameters */
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mr r30,r4
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mr r30,r4
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li r24,0 /* cpu # */
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li r24,0 /* cpu # */
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@ -1,3 +1,5 @@
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CFLAGS_bootx_init.o += -fPIC
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obj-y += pic.o setup.o time.o feature.o pci.o \
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obj-y += pic.o setup.o time.o feature.o pci.o \
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sleep.o low_i2c.o cache.o
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sleep.o low_i2c.o cache.o
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obj-$(CONFIG_PMAC_BACKLIGHT) += backlight.o
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obj-$(CONFIG_PMAC_BACKLIGHT) += backlight.o
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@ -6,5 +8,6 @@ obj-$(CONFIG_CPU_FREQ_PMAC64) += cpufreq_64.o
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obj-$(CONFIG_NVRAM) += nvram.o
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obj-$(CONFIG_NVRAM) += nvram.o
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# ppc64 pmac doesn't define CONFIG_NVRAM but needs nvram stuff
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# ppc64 pmac doesn't define CONFIG_NVRAM but needs nvram stuff
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obj-$(CONFIG_PPC64) += nvram.o
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obj-$(CONFIG_PPC64) += nvram.o
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obj-$(CONFIG_PPC32) += bootx_init.o
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obj-$(CONFIG_SMP) += smp.o
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obj-$(CONFIG_SMP) += smp.o
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obj-$(CONFIG_PPC_MERGE) += udbg_scc.o udbg_adb.o
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obj-$(CONFIG_PPC_MERGE) += udbg_scc.o udbg_adb.o
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@ -0,0 +1,547 @@
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/*
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* Early boot support code for BootX bootloader
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*
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* Copyright (C) 2005 Ben. Herrenschmidt (benh@kernel.crashing.org)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/version.h>
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#include <asm/sections.h>
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#include <asm/prom.h>
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#include <asm/page.h>
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#include <asm/bootx.h>
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#include <asm/bootinfo.h>
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#include <asm/btext.h>
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#include <asm/io.h>
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#undef DEBUG
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#define SET_BOOT_BAT
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#ifdef DEBUG
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#define DBG(fmt...) do { bootx_printf(fmt); } while(0)
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#else
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#define DBG(fmt...) do { } while(0)
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#endif
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extern void __start(unsigned long r3, unsigned long r4, unsigned long r5);
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static unsigned long __initdata bootx_dt_strbase;
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static unsigned long __initdata bootx_dt_strend;
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static unsigned long __initdata bootx_node_chosen;
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static boot_infos_t * __initdata bootx_info;
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static char __initdata bootx_disp_path[256];
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/* Is boot-info compatible ? */
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#define BOOT_INFO_IS_COMPATIBLE(bi) \
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((bi)->compatible_version <= BOOT_INFO_VERSION)
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#define BOOT_INFO_IS_V2_COMPATIBLE(bi) ((bi)->version >= 2)
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#define BOOT_INFO_IS_V4_COMPATIBLE(bi) ((bi)->version >= 4)
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#ifdef CONFIG_BOOTX_TEXT
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static void __init bootx_printf(const char *format, ...)
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{
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const char *p, *q, *s;
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va_list args;
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unsigned long v;
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va_start(args, format);
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for (p = format; *p != 0; p = q) {
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for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
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;
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if (q > p)
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btext_drawtext(p, q - p);
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if (*q == 0)
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break;
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if (*q == '\n') {
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++q;
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btext_flushline();
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btext_drawstring("\r\n");
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btext_flushline();
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continue;
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}
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++q;
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if (*q == 0)
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break;
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switch (*q) {
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case 's':
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++q;
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s = va_arg(args, const char *);
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if (s == NULL)
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s = "<NULL>";
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btext_drawstring(s);
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break;
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case 'x':
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++q;
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v = va_arg(args, unsigned long);
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btext_drawhex(v);
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break;
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}
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}
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}
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#else /* CONFIG_BOOTX_TEXT */
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static void __init bootx_printf(const char *format, ...) {}
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#endif /* CONFIG_BOOTX_TEXT */
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static void * __init bootx_early_getprop(unsigned long base,
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unsigned long node,
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char *prop)
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{
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struct bootx_dt_node *np = (struct bootx_dt_node *)(base + node);
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u32 *ppp = &np->properties;
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while(*ppp) {
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struct bootx_dt_prop *pp =
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(struct bootx_dt_prop *)(base + *ppp);
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if (strcmp((char *)((unsigned long)pp->name + base),
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prop) == 0) {
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return (void *)((unsigned long)pp->value + base);
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}
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ppp = &pp->next;
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}
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return NULL;
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}
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#define dt_push_token(token, mem) \
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do { \
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*(mem) = _ALIGN_UP(*(mem),4); \
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*((u32 *)*(mem)) = token; \
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*(mem) += 4; \
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} while(0)
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static unsigned long __init bootx_dt_find_string(char *str)
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{
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char *s, *os;
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s = os = (char *)bootx_dt_strbase;
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s += 4;
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while (s < (char *)bootx_dt_strend) {
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if (strcmp(s, str) == 0)
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return s - os;
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s += strlen(s) + 1;
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}
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return 0;
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}
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static void __init bootx_dt_add_prop(char *name, void *data, int size,
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unsigned long *mem_end)
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{
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unsigned long soff = bootx_dt_find_string(name);
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if (data == NULL)
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size = 0;
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if (soff == 0) {
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bootx_printf("WARNING: Can't find string index for <%s>\n",
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name);
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return;
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}
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if (size > 0x20000) {
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bootx_printf("WARNING: ignoring large property ");
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bootx_printf("%s length 0x%x\n", name, size);
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return;
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}
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dt_push_token(OF_DT_PROP, mem_end);
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dt_push_token(size, mem_end);
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dt_push_token(soff, mem_end);
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/* push property content */
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if (size && data) {
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memcpy((void *)*mem_end, data, size);
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*mem_end = _ALIGN_UP(*mem_end + size, 4);
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}
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}
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static void __init bootx_add_chosen_props(unsigned long base,
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unsigned long *mem_end)
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{
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u32 val = _MACH_Pmac;
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bootx_dt_add_prop("linux,platform", &val, 4, mem_end);
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if (bootx_info->kernelParamsOffset) {
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char *args = (char *)((unsigned long)bootx_info) +
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bootx_info->kernelParamsOffset;
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bootx_dt_add_prop("bootargs", args, strlen(args) + 1, mem_end);
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}
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if (bootx_info->ramDisk) {
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val = ((unsigned long)bootx_info) + bootx_info->ramDisk;
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bootx_dt_add_prop("linux,initrd-start", &val, 4, mem_end);
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val += bootx_info->ramDiskSize;
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bootx_dt_add_prop("linux,initrd-end", &val, 4, mem_end);
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}
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if (strlen(bootx_disp_path))
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bootx_dt_add_prop("linux,stdout-path", bootx_disp_path,
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strlen(bootx_disp_path) + 1, mem_end);
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}
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static void __init bootx_add_display_props(unsigned long base,
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unsigned long *mem_end)
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{
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bootx_dt_add_prop("linux,boot-display", NULL, 0, mem_end);
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bootx_dt_add_prop("linux,opened", NULL, 0, mem_end);
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}
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static void __init bootx_dt_add_string(char *s, unsigned long *mem_end)
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{
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unsigned int l = strlen(s) + 1;
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memcpy((void *)*mem_end, s, l);
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bootx_dt_strend = *mem_end = *mem_end + l;
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}
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static void __init bootx_scan_dt_build_strings(unsigned long base,
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unsigned long node,
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unsigned long *mem_end)
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{
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struct bootx_dt_node *np = (struct bootx_dt_node *)(base + node);
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u32 *cpp, *ppp = &np->properties;
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unsigned long soff;
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char *namep;
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/* Keep refs to known nodes */
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namep = np->full_name ? (char *)(base + np->full_name) : NULL;
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if (namep == NULL) {
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bootx_printf("Node without a full name !\n");
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namep = "";
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}
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DBG("* strings: %s\n", namep);
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if (!strcmp(namep, "/chosen")) {
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DBG(" detected /chosen ! adding properties names !\n");
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bootx_dt_add_string("linux,platform", mem_end);
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bootx_dt_add_string("linux,stdout-path", mem_end);
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bootx_dt_add_string("linux,initrd-start", mem_end);
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bootx_dt_add_string("linux,initrd-end", mem_end);
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bootx_dt_add_string("bootargs", mem_end);
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bootx_node_chosen = node;
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}
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if (node == bootx_info->dispDeviceRegEntryOffset) {
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DBG(" detected display ! adding properties names !\n");
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bootx_dt_add_string("linux,boot-display", mem_end);
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bootx_dt_add_string("linux,opened", mem_end);
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strncpy(bootx_disp_path, namep, 255);
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}
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/* get and store all property names */
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while (*ppp) {
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struct bootx_dt_prop *pp =
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(struct bootx_dt_prop *)(base + *ppp);
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|
|
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namep = pp->name ? (char *)(base + pp->name) : NULL;
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if (namep == NULL || strcmp(namep, "name") == 0)
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goto next;
|
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/* get/create string entry */
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soff = bootx_dt_find_string(namep);
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|
if (soff == 0)
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bootx_dt_add_string(namep, mem_end);
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|
next:
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ppp = &pp->next;
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|
}
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/* do all our children */
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cpp = &np->child;
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while(*cpp) {
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np = (struct bootx_dt_node *)(base + *cpp);
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bootx_scan_dt_build_strings(base, *cpp, mem_end);
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cpp = &np->sibling;
|
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|
}
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|
}
|
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|
|
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static void __init bootx_scan_dt_build_struct(unsigned long base,
|
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unsigned long node,
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unsigned long *mem_end)
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|
{
|
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|
struct bootx_dt_node *np = (struct bootx_dt_node *)(base + node);
|
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|
u32 *cpp, *ppp = &np->properties;
|
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|
char *namep, *p, *ep, *lp;
|
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|
int l;
|
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|
|
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|
dt_push_token(OF_DT_BEGIN_NODE, mem_end);
|
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|
|
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|
/* get the node's full name */
|
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|
namep = np->full_name ? (char *)(base + np->full_name) : NULL;
|
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|
if (namep == NULL)
|
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|
namep = "";
|
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|
l = strlen(namep);
|
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|
|
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|
DBG("* struct: %s\n", namep);
|
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|
|
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|
/* Fixup an Apple bug where they have bogus \0 chars in the
|
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|
* middle of the path in some properties, and extract
|
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|
* the unit name (everything after the last '/').
|
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|
*/
|
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|
memcpy((void *)*mem_end, namep, l + 1);
|
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|
namep = (char *)*mem_end;
|
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|
for (lp = p = namep, ep = namep + l; p < ep; p++) {
|
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|
if (*p == '/')
|
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|
lp = namep;
|
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|
else if (*p != 0)
|
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|
*lp++ = *p;
|
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|
}
|
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|
*lp = 0;
|
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|
*mem_end = _ALIGN_UP((unsigned long)lp + 1, 4);
|
||||||
|
|
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|
/* get and store all properties */
|
||||||
|
while (*ppp) {
|
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|
struct bootx_dt_prop *pp =
|
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|
(struct bootx_dt_prop *)(base + *ppp);
|
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|
|
||||||
|
namep = pp->name ? (char *)(base + pp->name) : NULL;
|
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|
/* Skip "name" */
|
||||||
|
if (namep == NULL || !strcmp(namep, "name"))
|
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|
goto next;
|
||||||
|
/* Skip "bootargs" in /chosen too as we replace it */
|
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|
if (node == bootx_node_chosen && !strcmp(namep, "bootargs"))
|
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|
goto next;
|
||||||
|
|
||||||
|
/* push property head */
|
||||||
|
bootx_dt_add_prop(namep,
|
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|
pp->value ? (void *)(base + pp->value): NULL,
|
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|
pp->length, mem_end);
|
||||||
|
next:
|
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|
ppp = &pp->next;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (node == bootx_node_chosen)
|
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|
bootx_add_chosen_props(base, mem_end);
|
||||||
|
if (node == bootx_info->dispDeviceRegEntryOffset)
|
||||||
|
bootx_add_display_props(base, mem_end);
|
||||||
|
|
||||||
|
/* do all our children */
|
||||||
|
cpp = &np->child;
|
||||||
|
while(*cpp) {
|
||||||
|
np = (struct bootx_dt_node *)(base + *cpp);
|
||||||
|
bootx_scan_dt_build_struct(base, *cpp, mem_end);
|
||||||
|
cpp = &np->sibling;
|
||||||
|
}
|
||||||
|
|
||||||
|
dt_push_token(OF_DT_END_NODE, mem_end);
|
||||||
|
}
|
||||||
|
|
||||||
|
static unsigned long __init bootx_flatten_dt(unsigned long start)
|
||||||
|
{
|
||||||
|
boot_infos_t *bi = bootx_info;
|
||||||
|
unsigned long mem_start, mem_end;
|
||||||
|
struct boot_param_header *hdr;
|
||||||
|
unsigned long base;
|
||||||
|
u64 *rsvmap;
|
||||||
|
|
||||||
|
/* Start using memory after the big blob passed by BootX, get
|
||||||
|
* some space for the header
|
||||||
|
*/
|
||||||
|
mem_start = mem_end = _ALIGN_UP(((unsigned long)bi) + start, 4);
|
||||||
|
DBG("Boot params header at: %x\n", mem_start);
|
||||||
|
hdr = (struct boot_param_header *)mem_start;
|
||||||
|
mem_end += sizeof(struct boot_param_header);
|
||||||
|
rsvmap = (u64 *)(_ALIGN_UP(mem_end, 8));
|
||||||
|
hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - mem_start;
|
||||||
|
mem_end = ((unsigned long)rsvmap) + 8 * sizeof(u64);
|
||||||
|
|
||||||
|
/* Get base of tree */
|
||||||
|
base = ((unsigned long)bi) + bi->deviceTreeOffset;
|
||||||
|
|
||||||
|
/* Build string array */
|
||||||
|
DBG("Building string array at: %x\n", mem_end);
|
||||||
|
DBG("Device Tree Base=%x\n", base);
|
||||||
|
bootx_dt_strbase = mem_end;
|
||||||
|
mem_end += 4;
|
||||||
|
bootx_dt_strend = mem_end;
|
||||||
|
bootx_scan_dt_build_strings(base, 4, &mem_end);
|
||||||
|
hdr->off_dt_strings = bootx_dt_strbase - mem_start;
|
||||||
|
hdr->dt_strings_size = bootx_dt_strend - bootx_dt_strbase;
|
||||||
|
|
||||||
|
/* Build structure */
|
||||||
|
mem_end = _ALIGN(mem_end, 16);
|
||||||
|
DBG("Building device tree structure at: %x\n", mem_end);
|
||||||
|
hdr->off_dt_struct = mem_end - mem_start;
|
||||||
|
bootx_scan_dt_build_struct(base, 4, &mem_end);
|
||||||
|
dt_push_token(OF_DT_END, &mem_end);
|
||||||
|
|
||||||
|
/* Finish header */
|
||||||
|
hdr->boot_cpuid_phys = 0;
|
||||||
|
hdr->magic = OF_DT_HEADER;
|
||||||
|
hdr->totalsize = mem_end - mem_start;
|
||||||
|
hdr->version = OF_DT_VERSION;
|
||||||
|
/* Version 16 is not backward compatible */
|
||||||
|
hdr->last_comp_version = 0x10;
|
||||||
|
|
||||||
|
/* Reserve the whole thing and copy the reserve map in, we
|
||||||
|
* also bump mem_reserve_cnt to cause further reservations to
|
||||||
|
* fail since it's too late.
|
||||||
|
*/
|
||||||
|
mem_end = _ALIGN(mem_end, PAGE_SIZE);
|
||||||
|
DBG("End of boot params: %x\n", mem_end);
|
||||||
|
rsvmap[0] = mem_start;
|
||||||
|
rsvmap[1] = mem_end;
|
||||||
|
rsvmap[2] = 0;
|
||||||
|
rsvmap[3] = 0;
|
||||||
|
|
||||||
|
return (unsigned long)hdr;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
#ifdef CONFIG_BOOTX_TEXT
|
||||||
|
static void __init btext_welcome(boot_infos_t *bi)
|
||||||
|
{
|
||||||
|
unsigned long flags;
|
||||||
|
unsigned long pvr;
|
||||||
|
|
||||||
|
bootx_printf("Welcome to Linux, kernel " UTS_RELEASE "\n");
|
||||||
|
bootx_printf("\nlinked at : 0x%x", KERNELBASE);
|
||||||
|
bootx_printf("\nframe buffer at : 0x%x", bi->dispDeviceBase);
|
||||||
|
bootx_printf(" (phys), 0x%x", bi->logicalDisplayBase);
|
||||||
|
bootx_printf(" (log)");
|
||||||
|
bootx_printf("\nklimit : 0x%x",(unsigned long)klimit);
|
||||||
|
bootx_printf("\nboot_info at : 0x%x", bi);
|
||||||
|
__asm__ __volatile__ ("mfmsr %0" : "=r" (flags));
|
||||||
|
bootx_printf("\nMSR : 0x%x", flags);
|
||||||
|
__asm__ __volatile__ ("mfspr %0, 287" : "=r" (pvr));
|
||||||
|
bootx_printf("\nPVR : 0x%x", pvr);
|
||||||
|
pvr >>= 16;
|
||||||
|
if (pvr > 1) {
|
||||||
|
__asm__ __volatile__ ("mfspr %0, 1008" : "=r" (flags));
|
||||||
|
bootx_printf("\nHID0 : 0x%x", flags);
|
||||||
|
}
|
||||||
|
if (pvr == 8 || pvr == 12 || pvr == 0x800c) {
|
||||||
|
__asm__ __volatile__ ("mfspr %0, 1019" : "=r" (flags));
|
||||||
|
bootx_printf("\nICTC : 0x%x", flags);
|
||||||
|
}
|
||||||
|
#ifdef DEBUG
|
||||||
|
bootx_printf("\n\n");
|
||||||
|
bootx_printf("bi->deviceTreeOffset : 0x%x\n",
|
||||||
|
bi->deviceTreeOffset);
|
||||||
|
bootx_printf("bi->deviceTreeSize : 0x%x\n",
|
||||||
|
bi->deviceTreeSize);
|
||||||
|
#endif
|
||||||
|
bootx_printf("\n\n");
|
||||||
|
}
|
||||||
|
#endif /* CONFIG_BOOTX_TEXT */
|
||||||
|
|
||||||
|
void __init bootx_init(unsigned long r3, unsigned long r4)
|
||||||
|
{
|
||||||
|
boot_infos_t *bi = (boot_infos_t *) r4;
|
||||||
|
unsigned long hdr;
|
||||||
|
unsigned long space;
|
||||||
|
unsigned long ptr, x;
|
||||||
|
char *model;
|
||||||
|
unsigned long offset = reloc_offset();
|
||||||
|
|
||||||
|
reloc_got2(offset);
|
||||||
|
|
||||||
|
bootx_info = bi;
|
||||||
|
|
||||||
|
/* We haven't cleared any bss at this point, make sure
|
||||||
|
* what we need is initialized
|
||||||
|
*/
|
||||||
|
bootx_dt_strbase = bootx_dt_strend = 0;
|
||||||
|
bootx_node_chosen = 0;
|
||||||
|
bootx_disp_path[0] = 0;
|
||||||
|
|
||||||
|
if (!BOOT_INFO_IS_V2_COMPATIBLE(bi))
|
||||||
|
bi->logicalDisplayBase = bi->dispDeviceBase;
|
||||||
|
|
||||||
|
#ifdef CONFIG_BOOTX_TEXT
|
||||||
|
btext_setup_display(bi->dispDeviceRect[2] - bi->dispDeviceRect[0],
|
||||||
|
bi->dispDeviceRect[3] - bi->dispDeviceRect[1],
|
||||||
|
bi->dispDeviceDepth, bi->dispDeviceRowBytes,
|
||||||
|
(unsigned long)bi->logicalDisplayBase);
|
||||||
|
btext_clearscreen();
|
||||||
|
btext_flushscreen();
|
||||||
|
#endif /* CONFIG_BOOTX_TEXT */
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Test if boot-info is compatible. Done only in config
|
||||||
|
* CONFIG_BOOTX_TEXT since there is nothing much we can do
|
||||||
|
* with an incompatible version, except display a message
|
||||||
|
* and eventually hang the processor...
|
||||||
|
*
|
||||||
|
* I'll try to keep enough of boot-info compatible in the
|
||||||
|
* future to always allow display of this message;
|
||||||
|
*/
|
||||||
|
if (!BOOT_INFO_IS_COMPATIBLE(bi)) {
|
||||||
|
bootx_printf(" !!! WARNING - Incompatible version"
|
||||||
|
" of BootX !!!\n\n\n");
|
||||||
|
for (;;)
|
||||||
|
;
|
||||||
|
}
|
||||||
|
if (bi->architecture != BOOT_ARCH_PCI) {
|
||||||
|
bootx_printf(" !!! WARNING - Usupported machine"
|
||||||
|
" architecture !\n");
|
||||||
|
for (;;)
|
||||||
|
;
|
||||||
|
}
|
||||||
|
|
||||||
|
#ifdef CONFIG_BOOTX_TEXT
|
||||||
|
btext_welcome(bi);
|
||||||
|
#endif
|
||||||
|
/* New BootX enters kernel with MMU off, i/os are not allowed
|
||||||
|
* here. This hack will have been done by the boostrap anyway.
|
||||||
|
*/
|
||||||
|
if (bi->version < 4) {
|
||||||
|
/*
|
||||||
|
* XXX If this is an iMac, turn off the USB controller.
|
||||||
|
*/
|
||||||
|
model = (char *) bootx_early_getprop(r4 + bi->deviceTreeOffset,
|
||||||
|
4, "model");
|
||||||
|
if (model
|
||||||
|
&& (strcmp(model, "iMac,1") == 0
|
||||||
|
|| strcmp(model, "PowerMac1,1") == 0)) {
|
||||||
|
bootx_printf("iMac,1 detected, shutting down USB \n");
|
||||||
|
out_le32((unsigned *)0x80880008, 1); /* XXX */
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Get a pointer that points above the device tree, args, ramdisk,
|
||||||
|
* etc... to use for generating the flattened tree
|
||||||
|
*/
|
||||||
|
if (bi->version < 5) {
|
||||||
|
space = bi->deviceTreeOffset + bi->deviceTreeSize;
|
||||||
|
if (bi->ramDisk)
|
||||||
|
space = bi->ramDisk + bi->ramDiskSize;
|
||||||
|
} else
|
||||||
|
space = bi->totalParamsSize;
|
||||||
|
|
||||||
|
bootx_printf("Total space used by parameters & ramdisk: %x \n", space);
|
||||||
|
|
||||||
|
/* New BootX will have flushed all TLBs and enters kernel with
|
||||||
|
* MMU switched OFF, so this should not be useful anymore.
|
||||||
|
*/
|
||||||
|
if (bi->version < 4) {
|
||||||
|
bootx_printf("Touching pages...\n");
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Touch each page to make sure the PTEs for them
|
||||||
|
* are in the hash table - the aim is to try to avoid
|
||||||
|
* getting DSI exceptions while copying the kernel image.
|
||||||
|
*/
|
||||||
|
for (ptr = ((unsigned long) &_stext) & PAGE_MASK;
|
||||||
|
ptr < (unsigned long)bi + space; ptr += PAGE_SIZE)
|
||||||
|
x = *(volatile unsigned long *)ptr;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Ok, now we need to generate a flattened device-tree to pass
|
||||||
|
* to the kernel
|
||||||
|
*/
|
||||||
|
bootx_printf("Preparing boot params...\n");
|
||||||
|
|
||||||
|
hdr = bootx_flatten_dt(space);
|
||||||
|
|
||||||
|
#ifdef CONFIG_BOOTX_TEXT
|
||||||
|
#ifdef SET_BOOT_BAT
|
||||||
|
bootx_printf("Preparing BAT...\n");
|
||||||
|
btext_prepare_BAT();
|
||||||
|
#else
|
||||||
|
btext_unmap();
|
||||||
|
#endif
|
||||||
|
#endif
|
||||||
|
|
||||||
|
reloc_got2(-offset);
|
||||||
|
|
||||||
|
__start(hdr, KERNELBASE + offset, 0);
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,166 @@
|
||||||
|
/*
|
||||||
|
* This file describes the structure passed from the BootX application
|
||||||
|
* (for MacOS) when it is used to boot Linux.
|
||||||
|
*
|
||||||
|
* Written by Benjamin Herrenschmidt.
|
||||||
|
*/
|
||||||
|
|
||||||
|
|
||||||
|
#ifndef __ASM_BOOTX_H__
|
||||||
|
#define __ASM_BOOTX_H__
|
||||||
|
|
||||||
|
#ifdef macintosh
|
||||||
|
#include <Types.h>
|
||||||
|
#include "linux_type_defs.h"
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#ifdef macintosh
|
||||||
|
/* All this requires PowerPC alignment */
|
||||||
|
#pragma options align=power
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* On kernel entry:
|
||||||
|
*
|
||||||
|
* r3 = 0x426f6f58 ('BooX')
|
||||||
|
* r4 = pointer to boot_infos
|
||||||
|
* r5 = NULL
|
||||||
|
*
|
||||||
|
* Data and instruction translation disabled, interrupts
|
||||||
|
* disabled, kernel loaded at physical 0x00000000 on PCI
|
||||||
|
* machines (will be different on NuBus).
|
||||||
|
*/
|
||||||
|
|
||||||
|
#define BOOT_INFO_VERSION 5
|
||||||
|
#define BOOT_INFO_COMPATIBLE_VERSION 1
|
||||||
|
|
||||||
|
/* Bit in the architecture flag mask. More to be defined in
|
||||||
|
future versions. Note that either BOOT_ARCH_PCI or
|
||||||
|
BOOT_ARCH_NUBUS is set. The other BOOT_ARCH_NUBUS_xxx are
|
||||||
|
set additionally when BOOT_ARCH_NUBUS is set.
|
||||||
|
*/
|
||||||
|
#define BOOT_ARCH_PCI 0x00000001UL
|
||||||
|
#define BOOT_ARCH_NUBUS 0x00000002UL
|
||||||
|
#define BOOT_ARCH_NUBUS_PDM 0x00000010UL
|
||||||
|
#define BOOT_ARCH_NUBUS_PERFORMA 0x00000020UL
|
||||||
|
#define BOOT_ARCH_NUBUS_POWERBOOK 0x00000040UL
|
||||||
|
|
||||||
|
/* Maximum number of ranges in phys memory map */
|
||||||
|
#define MAX_MEM_MAP_SIZE 26
|
||||||
|
|
||||||
|
/* This is the format of an element in the physical memory map. Note that
|
||||||
|
the map is optional and current BootX will only build it for pre-PCI
|
||||||
|
machines */
|
||||||
|
typedef struct boot_info_map_entry
|
||||||
|
{
|
||||||
|
__u32 physAddr; /* Physical starting address */
|
||||||
|
__u32 size; /* Size in bytes */
|
||||||
|
} boot_info_map_entry_t;
|
||||||
|
|
||||||
|
|
||||||
|
/* Here are the boot informations that are passed to the bootstrap
|
||||||
|
* Note that the kernel arguments and the device tree are appended
|
||||||
|
* at the end of this structure. */
|
||||||
|
typedef struct boot_infos
|
||||||
|
{
|
||||||
|
/* Version of this structure */
|
||||||
|
__u32 version;
|
||||||
|
/* backward compatible down to version: */
|
||||||
|
__u32 compatible_version;
|
||||||
|
|
||||||
|
/* NEW (vers. 2) this holds the current _logical_ base addr of
|
||||||
|
the frame buffer (for use by early boot message) */
|
||||||
|
__u8* logicalDisplayBase;
|
||||||
|
|
||||||
|
/* NEW (vers. 4) Apple's machine identification */
|
||||||
|
__u32 machineID;
|
||||||
|
|
||||||
|
/* NEW (vers. 4) Detected hw architecture */
|
||||||
|
__u32 architecture;
|
||||||
|
|
||||||
|
/* The device tree (internal addresses relative to the beginning of the tree,
|
||||||
|
* device tree offset relative to the beginning of this structure).
|
||||||
|
* On pre-PCI macintosh (BOOT_ARCH_PCI bit set to 0 in architecture), this
|
||||||
|
* field is 0.
|
||||||
|
*/
|
||||||
|
__u32 deviceTreeOffset; /* Device tree offset */
|
||||||
|
__u32 deviceTreeSize; /* Size of the device tree */
|
||||||
|
|
||||||
|
/* Some infos about the current MacOS display */
|
||||||
|
__u32 dispDeviceRect[4]; /* left,top,right,bottom */
|
||||||
|
__u32 dispDeviceDepth; /* (8, 16 or 32) */
|
||||||
|
__u8* dispDeviceBase; /* base address (physical) */
|
||||||
|
__u32 dispDeviceRowBytes; /* rowbytes (in bytes) */
|
||||||
|
__u32 dispDeviceColorsOffset; /* Colormap (8 bits only) or 0 (*) */
|
||||||
|
/* Optional offset in the registry to the current
|
||||||
|
* MacOS display. (Can be 0 when not detected) */
|
||||||
|
__u32 dispDeviceRegEntryOffset;
|
||||||
|
|
||||||
|
/* Optional pointer to boot ramdisk (offset from this structure) */
|
||||||
|
__u32 ramDisk;
|
||||||
|
__u32 ramDiskSize; /* size of ramdisk image */
|
||||||
|
|
||||||
|
/* Kernel command line arguments (offset from this structure) */
|
||||||
|
__u32 kernelParamsOffset;
|
||||||
|
|
||||||
|
/* ALL BELOW NEW (vers. 4) */
|
||||||
|
|
||||||
|
/* This defines the physical memory. Valid with BOOT_ARCH_NUBUS flag
|
||||||
|
(non-PCI) only. On PCI, memory is contiguous and it's size is in the
|
||||||
|
device-tree. */
|
||||||
|
boot_info_map_entry_t
|
||||||
|
physMemoryMap[MAX_MEM_MAP_SIZE]; /* Where the phys memory is */
|
||||||
|
__u32 physMemoryMapSize; /* How many entries in map */
|
||||||
|
|
||||||
|
|
||||||
|
/* The framebuffer size (optional, currently 0) */
|
||||||
|
__u32 frameBufferSize; /* Represents a max size, can be 0. */
|
||||||
|
|
||||||
|
/* NEW (vers. 5) */
|
||||||
|
|
||||||
|
/* Total params size (args + colormap + device tree + ramdisk) */
|
||||||
|
__u32 totalParamsSize;
|
||||||
|
|
||||||
|
} boot_infos_t;
|
||||||
|
|
||||||
|
/* (*) The format of the colormap is 256 * 3 * 2 bytes. Each color index
|
||||||
|
* is represented by 3 short words containing a 16 bits (unsigned) color
|
||||||
|
* component. Later versions may contain the gamma table for direct-color
|
||||||
|
* devices here.
|
||||||
|
*/
|
||||||
|
#define BOOTX_COLORTABLE_SIZE (256UL*3UL*2UL)
|
||||||
|
|
||||||
|
/* BootX passes the device-tree using a format that comes from earlier
|
||||||
|
* ppc32 kernels. This used to match what is in prom.h, but not anymore
|
||||||
|
* so we now define it here
|
||||||
|
*/
|
||||||
|
struct bootx_dt_prop {
|
||||||
|
u32 name;
|
||||||
|
int length;
|
||||||
|
u32 value;
|
||||||
|
u32 next;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct bootx_dt_node {
|
||||||
|
u32 unused0;
|
||||||
|
u32 unused1;
|
||||||
|
u32 phandle; /* not really available */
|
||||||
|
u32 unused2;
|
||||||
|
u32 unused3;
|
||||||
|
u32 unused4;
|
||||||
|
u32 unused5;
|
||||||
|
u32 full_name;
|
||||||
|
u32 properties;
|
||||||
|
u32 parent;
|
||||||
|
u32 child;
|
||||||
|
u32 sibling;
|
||||||
|
u32 next;
|
||||||
|
u32 allnext;
|
||||||
|
};
|
||||||
|
|
||||||
|
extern void bootx_init(unsigned long r4, unsigned long phys);
|
||||||
|
|
||||||
|
#ifdef macintosh
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#pragma options align=reset
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#endif
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#endif
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