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Use PHDR's p_paddr for loading PPC ELFs.

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Use the entry point, from now on this is a realmode vector.
This commit is contained in:
dhewg 2009-04-07 23:23:58 +02:00 committed by bushing
parent 65ef5abb3d
commit ec03192492
4 changed files with 19 additions and 24 deletions
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2
elf.h
View File

@ -10,7 +10,7 @@ typedef struct {
u16 e_type; u16 e_type;
u16 e_machine; u16 e_machine;
u32 e_version; u32 e_version;
void *e_entry; u32 e_entry;
u32 e_phoff; u32 e_phoff;
u32 e_shoff; u32 e_shoff;
u32 e_flags; u32 e_flags;

36
powerpc.c
View File

@ -26,32 +26,28 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#include "start.h" #include "start.h"
#include "gecko.h" #include "gecko.h"
void powerpc_upload_stub(u32 entry)
const u32 stub_default[0x10] = {
0x3c600000,
0x60633400,
0x7c7a03a6,
0x38600000,
0x7c7b03a6,
0x4c000064,
0,
};
void powerpc_upload_stub(const u32 *stub, u32 len)
{ {
u32 i; u32 i;
set32(HW_EXICTRL, EXICTRL_ENABLE_EXI); set32(HW_EXICTRL, EXICTRL_ENABLE_EXI);
if(stub == NULL || len == 0) // lis r3, entry@h
{ write32(EXI_BOOT_BASE + 4 * 0, 0x3c600000 | entry >> 16);
stub = stub_default; // ori r3, r3, entry@l
len = sizeof(stub_default) / sizeof(u32); write32(EXI_BOOT_BASE + 4 * 1, 0x60630000 | (entry & 0xffff));
} // mtsrr0 r3
write32(EXI_BOOT_BASE + 4 * 2, 0x7c7a03a6);
// li r3, 0
write32(EXI_BOOT_BASE + 4 * 3, 0x38600000);
// mtsrr1 r3
write32(EXI_BOOT_BASE + 4 * 4, 0x7c7b03a6);
// rfi
write32(EXI_BOOT_BASE + 4 * 5, 0x4c000064);
for (i = 6; i < 0x10; ++i)
write32(EXI_BOOT_BASE + 4 * i, 0);
for(i = 0; i < len; i++)
write32(EXI_BOOT_BASE + 4*i, stub[i]);
set32(HW_DIFLAGS, DIFLAGS_BOOT_CODE); set32(HW_DIFLAGS, DIFLAGS_BOOT_CODE);
gecko_printf("disabling EXI now...\n"); gecko_printf("disabling EXI now...\n");

2
powerpc.h
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@ -2,7 +2,7 @@
#define __POWERPC_H__ 1 #define __POWERPC_H__ 1
void ppc_boot_code(); void ppc_boot_code();
void powerpc_upload_stub(const u32 *stub, u32 len); void powerpc_upload_stub(u32 entry);
void powerpc_hang(); void powerpc_hang();
void powerpc_reset(); void powerpc_reset();

3
powerpc_elf.c
View File

@ -67,7 +67,6 @@ int powerpc_load_file(const char *path)
gecko_printf("Skipping PHDR of type %d\n",phdr->p_type); gecko_printf("Skipping PHDR of type %d\n",phdr->p_type);
} else { } else {
void *dst = phdr->p_paddr; void *dst = phdr->p_paddr;
dst = (void*)((u32)dst & ~0xC0000000);
gecko_printf("LOAD 0x%x -> %p [0x%x]\n", phdr->p_offset, phdr->p_paddr, phdr->p_filesz); gecko_printf("LOAD 0x%x -> %p [0x%x]\n", phdr->p_offset, phdr->p_paddr, phdr->p_filesz);
fres = f_lseek(&fd, phdr->p_offset); fres = f_lseek(&fd, phdr->p_offset);
@ -85,7 +84,7 @@ int powerpc_load_file(const char *path)
dc_flushall(); dc_flushall();
gecko_printf("ELF load done, booting PPC...\n"); gecko_printf("ELF load done, booting PPC...\n");
powerpc_upload_stub(NULL,0); powerpc_upload_stub(elfhdr.e_entry);
powerpc_reset(); powerpc_reset();
gecko_printf("PPC booted!\n"); gecko_printf("PPC booted!\n");