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IPC to boot in-mem PPC ELF, with some test code.
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parent
05efa74484
commit
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4
boot2.h
4
boot2.h
@ -1,8 +1,10 @@
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#ifndef __BOOT2_H__
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#define __BOOT2_H__
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void boot2_ipc(volatile ipc_request *req);
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#include "ipc.h"
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int boot2_run(u32 tid_hi, u32 tid_lo);
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void boot2_init();
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void boot2_ipc(volatile ipc_request *req);
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#endif
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4
ipc.c
4
ipc.c
@ -10,6 +10,7 @@
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#include "sdhc.h"
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#include "crypto.h"
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#include "boot2.h"
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#include "powerpc.h"
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#include "panic.h"
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static volatile ipc_request in_queue[IPC_IN_SIZE] ALIGNED(32) MEM2_BSS;
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@ -136,6 +137,9 @@ static int process_slow(volatile ipc_request *req)
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boot2_ipc(req);
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return 0;
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break;
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case IPC_DEV_PPC:
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powerpc_ipc(req);
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break;
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default:
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gecko_printf("IPC: unknown SLOW request %02x-%04x\n", req->device, req->req);
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}
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3
ipc.h
3
ipc.h
@ -12,6 +12,7 @@
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#define IPC_DEV_KEYS 0x03
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#define IPC_DEV_AES 0x04
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#define IPC_DEV_BOOT2 0x05
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#define IPC_DEV_PPC 0x06
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#define IPC_SYS_PING 0x0000
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#define IPC_SYS_JUMP 0x0001
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@ -56,6 +57,8 @@
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#define IPC_BOOT2_RUN 0x0000
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#define IPC_PPC_BOOT 0x0000
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#define IPC_CODE (f,d,r) (((f)<<24)|((d)<<16)|(r))
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#define IPC_IN_SIZE 32
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2
main.c
2
main.c
@ -222,7 +222,7 @@ void *_main(void *base)
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gecko_printf("Trying to boot:" PPC_BOOT_FILE "\n");
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res = powerpc_load_file(PPC_BOOT_FILE);
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res = powerpc_boot_file(PPC_BOOT_FILE);
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if(res < 0) {
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gecko_printf("Failed to boot PPC: %d\n", res);
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gecko_printf("Continuing anyway\n");
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17
powerpc.c
17
powerpc.c
@ -20,7 +20,9 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "types.h"
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#include "memory.h"
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#include "powerpc.h"
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#include "powerpc_elf.h"
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#include "hollywood.h"
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#include "utils.h"
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#include "start.h"
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@ -73,3 +75,18 @@ void powerpc_reset()
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udelay(100000);
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set32(HW_EXICTRL, EXICTRL_ENABLE_EXI);
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}
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void powerpc_ipc(volatile ipc_request *req)
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{
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switch (req->req) {
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case IPC_PPC_BOOT:
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dc_invalidaterange((void *) req->args[0], (u32) req->args[1]);
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int res = powerpc_boot_mem((u8 *) req->args[0], (u32) req->args[1]);
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if (res)
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ipc_post(req->code, req->tag, 1, res);
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break;
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default:
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gecko_printf("IPC: unknown SLOW PPC request %04X\n", req->req);
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}
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}
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@ -1,9 +1,12 @@
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#ifndef __POWERPC_H__
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#define __POWERPC_H__ 1
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void ppc_boot_code();
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#include "ipc.h"
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void powerpc_upload_stub(u32 entry);
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void powerpc_hang();
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void powerpc_reset();
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void powerpc_ipc(volatile ipc_request *req);
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#endif
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@ -16,7 +16,7 @@ static Elf32_Ehdr elfhdr;
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static Elf32_Phdr phdrs[PHDR_MAX];
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static FIL fd;
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int powerpc_load_file(const char *path)
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int powerpc_boot_file(const char *path)
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{
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u32 read;
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FRESULT fres;
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@ -49,7 +49,7 @@ int powerpc_load_file(const char *path)
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fres = f_lseek(&fd, elfhdr.e_phoff);
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if(fres != FR_OK)
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return -fres;
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fres = f_read(&fd, phdrs, sizeof(phdrs[0])*elfhdr.e_phnum, &read);
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if(fres != FR_OK)
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return -fres;
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@ -67,7 +67,7 @@ int powerpc_load_file(const char *path)
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gecko_printf("Skipping PHDR of type %d\n",phdr->p_type);
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} else {
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void *dst = phdr->p_paddr;
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gecko_printf("LOAD 0x%x -> %p [0x%x]\n", phdr->p_offset, phdr->p_paddr, phdr->p_filesz);
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fres = f_lseek(&fd, phdr->p_offset);
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if(fres != FR_OK)
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@ -90,3 +90,61 @@ int powerpc_load_file(const char *path)
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return 0;
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}
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int powerpc_boot_mem(const u8 *addr, u32 len)
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{
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if (len < sizeof(Elf32_Ehdr))
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return -100;
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Elf32_Ehdr *ehdr = (Elf32_Ehdr *) addr;
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if (memcmp("\x7F" "ELF\x01\x02\x01\x00\x00", ehdr->e_ident, 9)) {
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gecko_printf("Invalid ELF header! 0x%02x 0x%02x 0x%02x 0x%02x\n",
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ehdr->e_ident[0], ehdr->e_ident[1],
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ehdr->e_ident[2], ehdr->e_ident[3]);
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return -101;
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}
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if (ehdr->e_phoff == 0 || ehdr->e_phnum == 0) {
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gecko_printf("ELF has no program headers!\n");
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return -102;
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}
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if (ehdr->e_phnum > PHDR_MAX) {
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gecko_printf("ELF has too many (%d) program headers!\n",
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elfhdr.e_phnum);
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return -102;
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}
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int count = ehdr->e_phnum;
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if (len < ehdr->e_phoff + count * sizeof(Elf32_Phdr))
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return -103;
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Elf32_Phdr *phdr = (Elf32_Phdr *) &addr[ehdr->e_phoff];
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// TODO: add more checks here
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// - phdrs out of bounds?
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// - loaded ELF overwrites itself?
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powerpc_hang();
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while (count--) {
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if (phdr->p_type != PT_LOAD) {
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gecko_printf("Skipping PHDR of type %d\n", phdr->p_type);
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} else {
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gecko_printf("LOAD 0x%x -> %p [0x%x]\n", phdr->p_offset, phdr->p_paddr, phdr->p_filesz);
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memcpy((void *) phdr->p_paddr, &addr[phdr->p_offset],
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phdr->p_filesz);
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}
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phdr++;
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}
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dc_flushall();
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gecko_printf("ELF load done, booting PPC...\n");
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powerpc_upload_stub(ehdr->e_entry);
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powerpc_reset();
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gecko_printf("PPC booted!\n");
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return 0;
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}
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#ifndef __POWERPC_H__
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#define __POWERPC_H__ 1
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#ifndef __POWERPC_ELF_H__
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#define __POWERPC_ELF_H__ 1
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int powerpc_load_file(const char *path);
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int powerpc_boot_file(const char *path);
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int powerpc_boot_mem(const u8 *addr, u32 len);
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#endif
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