Emulation/switch-coreboot
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Elfboot support.

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This commit is contained in:
Greg Watson 2003-04-24 03:32:13 +00:00
parent f0c291eef7
commit 2209d14e5f
4 changed files with 19 additions and 92 deletions
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2
src/arch/ppc/Config
View file

@ -1,2 +1,2 @@
#dir boot
dir boot
dir lib

89
src/arch/ppc/boot/boot.c
View file

@ -60,9 +60,9 @@ static struct {
int elf_check_arch(Elf_ehdr *ehdr)
{
return (
((ehdr->e_machine == EM_386) || (ehdr->e_machine == EM_486)) &&
(ehdr->e_machine == EM_PPC) &&
(ehdr->e_ident[EI_CLASS] == ELFCLASS32) &&
(ehdr->e_ident[EI_DATA] == ELFDATA2LSB)
(ehdr->e_ident[EI_DATA] == ELFDATA2MSB)
);
}
@ -92,91 +92,6 @@ void jmp_to_elf_entry(void *entry, unsigned long buffer)
printk_spew("buffer = 0x%08lx\n", buffer);
printk_spew(" elf_boot_notes = 0x%08lx\n", (unsigned long)&elf_boot_notes);
printk_spew("adjusted_boot_notes = 0x%08lx\n", adjusted_boot_notes);
/* Jump to kernel */
__asm__ __volatile__(
" cld \n\t"
/* Save the callee save registers... */
" pushl %%esi\n\t"
" pushl %%edi\n\t"
" pushl %%ebx\n\t"
/* Save the parameters I was passed */
" pushl $0\n\t" /* 20 adjust */
" pushl %0\n\t" /* 16 lb_start */
" pushl %1\n\t" /* 12 buffer */
" pushl %2\n\t" /* 8 lb_size */
" pushl %3\n\t" /* 4 entry */
" pushl %4\n\t" /* 0 elf_boot_notes */
/* Compute the adjustment */
" xorl %%eax, %%eax\n\t"
" subl 16(%%esp), %%eax\n\t"
" addl 12(%%esp), %%eax\n\t"
" addl 8(%%esp), %%eax\n\t"
" movl %%eax, 20(%%esp)\n\t"
/* Place a copy of linuxBIOS in it's new location */
/* Move ``longs'' the linuxBIOS size is 4 byte aligned */
" movl 12(%%esp), %%edi\n\t"
" addl 8(%%esp), %%edi\n\t"
" movl 16(%%esp), %%esi\n\t"
" movl 8(%%esp), %%ecx\n\n"
" shrl $2, %%ecx\n\t"
" rep movsl\n\t"
/* Adjust the stack pointer to point into the new linuxBIOS image */
" addl 20(%%esp), %%esp\n\t"
/* Adjust the instruction pointer to point into the new linuxBIOS image */
" movl $1f, %%eax\n\t"
" addl 20(%%esp), %%eax\n\t"
" jmp *%%eax\n\t"
"1: \n\t"
/* Copy the linuxBIOS bounce buffer over linuxBIOS */
/* Move ``longs'' the linuxBIOS size is 4 byte aligned */
" movl 16(%%esp), %%edi\n\t"
" movl 12(%%esp), %%esi\n\t"
" movl 8(%%esp), %%ecx\n\t"
" shrl $2, %%ecx\n\t"
" rep movsl\n\t"
/* Now jump to the loaded image */
" movl $0x0E1FB007, %%eax\n\t"
" movl 0(%%esp), %%ebx\n\t"
" call *4(%%esp)\n\t"
/* The loaded image returned? */
" cli \n\t"
" cld \n\t"
/* Copy the saved copy of linuxBIOS where linuxBIOS runs */
/* Move ``longs'' the linuxBIOS size is 4 byte aligned */
" movl 16(%%esp), %%edi\n\t"
" movl 12(%%esp), %%esi\n\t"
" addl 8(%%esp), %%esi\n\t"
" movl 8(%%esp), %%ecx\n\t"
" shrl $2, %%ecx\n\t"
" rep movsl\n\t"
/* Adjust the stack pointer to point into the old linuxBIOS image */
" subl 20(%%esp), %%esp\n\t"
/* Adjust the instruction pointer to point into the old linuxBIOS image */
" movl $1f, %%eax\n\t"
" subl 20(%%esp), %%eax\n\t"
" jmp *%%eax\n\t"
"1: \n\t"
/* Drop the parameters I was passed */
" addl $24, %%esp\n\t"
/* Restore the callee save registers */
" popl %%ebx\n\t"
" popl %%edi\n\t"
" popl %%esi\n\t"
::
"g" (lb_start), "g" (buffer), "g" (lb_size),
"g" (entry), "g"(adjusted_boot_notes)
);
}

12
src/arch/ppc/boot/linuxbios_table.c
View file

@ -117,13 +117,15 @@ void lb_strings(struct lb_header *header)
};
int i;
for(i = 0; i < sizeof(strings)/sizeof(strings[0]); i++) {
struct lb_string *rec;
struct lb_record *rec;
struct lb_string *str;
size_t len;
rec = lb_new_record(header);
str = (struct lb_string *)rec;
len = strlen(strings[i].string);
rec->tag = strings[i].tag;
rec->size = (sizeof(*rec) + len + 1 + 3) & ~3;
memcpy(rec->string, strings[i].string, len+1);
str->tag = strings[i].tag;
str->size = (sizeof(*rec) + len + 1 + 3) & ~3;
memcpy(str->string, strings[i].string, len+1);
}
}
@ -227,7 +229,9 @@ unsigned long write_linuxbios_table(
struct mem_range *ramp;
struct lb_header *head;
struct lb_memory *mem;
#if HAVE_OPTION_TABLE == 1
struct lb_record *rec_dest, *rec_src;
#endif
head = lb_table_init(low_table_end);
low_table_end = (unsigned long)head;

8
src/arch/ppc/include/arch/boot/boot.h Normal file
View file

@ -0,0 +1,8 @@
#ifndef ASM_I386_BOOT_H
#define ASM_I386_BOOT_H
#define ELF_CLASS ELFCLASS32
#define ELF_DATA ELFDATA2MSB
#define ELF_ARCH EM_PPC
#endif /* ASM_I386_BOOT_H */