diff options
Diffstat (limited to 'util/runfw/googlesnow.c')
| -rw-r--r-- | util/runfw/googlesnow.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/util/runfw/googlesnow.c b/util/runfw/googlesnow.c new file mode 100644 index 0000000000..25ef3a2d02 --- /dev/null +++ b/util/runfw/googlesnow.c @@ -0,0 +1,137 @@ +/* + * googlesnow - run google snow firmware in user mode + * + * Copyright (C) 2013 The ChromiumOS Authors. All rights reserved. + * + * 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; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA + */ + +#include <stdio.h> +#include <err.h> +#include <sys/mman.h> + +#include <string.h> + +enum addresses { + regs = 0x10000000, + sram = 0x2020000, + sramsize = 0x77fff, +}; + +// 0x20234b0 +main(int argc, char *argv[]) +{ + int fd; + int devmem; + void *regbase; + void *srambase; + void (*coreboot)(void) = (void *)0x2023400; + + if (argc != 3) + errx(1, "usage: runbios rom-file start-address"); + + fd = open(argv[1], 2); + if (fd < 0) + err(1, argv[1]); + devmem = open("/dev/mem", 2); + if (devmem < 0) + err(1, argv[1]); + srambase = mmap((void *)sram, sramsize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); + if (-1 == (int)sram) + err(1, "mmap"); + memset((void *)sram, 0xff, sramsize); + + /* now sort of do what bl1 does: read the 'rom' into the sram */ + /* skip the bl1. We don't run it. */ + if (pread(fd, coreboot, 30*1024, 0x2000) < 30*1024) + err(1, "read 'rom'"); + /* you want to be in gdb at this point. */ + coreboot = (void *) (strtoul(argv[2], 0, 0)); + coreboot(); +} +#if 0 +/* cc -g googlesnow.c */ +/* typical run +gdb a.out +(gdb) list 50 + +45 i2c = mmap((void *)0x12c60000, 0x10000, PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_PRIVATE, devmem, (off_t) 0x12c60000); +46 if (-1 == (int)i2c) +47 err(1, "mmap i2c"); +48 +49 /* now sort of do what bl1 does: read the 'rom' into the sram */ +50 if (pread(fd, coreboot, 30*1024, 0x2000) < 30*1024) +51 err(1, "read 'rom'"); +52 /* you want to be in gdb at this point. */ +53 coreboot = (void *) strtoull(argv[2], 0, 0); +54 coreboot(); +(gdb) br 54 +Breakpoint 3 at 0x8798: file runbios.c, line 54. +(gdb) run ~/coreboot/build/coreboot.rom 0x020234b0 +The program being debugged has been started already. +Start it from the beginning? (y or n) y + +Starting program: /root/coreboot/util/runarmbios/a.out ~/coreboot/build/coreboot.rom 0x020234b0 + +Breakpoint 3, main (argc=3, argv=0x7efff7c4) at runbios.c:54 +54 coreboot(); +(gdb) symbol-file ~/coreboot/build/cbfs/fallback/bootblock.debug +Load new symbol table from "/root/coreboot/build/cbfs/fallback/bootblock.debug"? (y or n) y +Reading symbols from /root/coreboot/build/cbfs/fallback/bootblock.debug...done. +Error in re-setting breakpoint 3: No source file named runbios.c. +(gdb) display/i $pc +1: x/i $pc +=> 0x8798: ldr r3, [r11, #-8] +(gdb) stepi +0x0000879c in ?? () +1: x/i $pc +=> 0x879c: blx r3 +(gdb) +0x020234b0 in call_bootblock () +1: x/i $pc +=> 0x20234b0 <call_bootblock>: ldr sp, [pc, #3800] ; 0x2024390 +(gdb) +0x020234b4 in call_bootblock () +1: x/i $pc +=> 0x20234b4 <call_bootblock+4>: bic sp, sp, #7 +(gdb) +0x020234b8 in call_bootblock () +1: x/i $pc +=> 0x20234b8 <call_bootblock+8>: mov r0, #0 +(gdb) +0x020234bc in call_bootblock () +1: x/i $pc +=> 0x20234bc <call_bootblock+12>: blx 0x20244b8 <main> +(gdb) +main (bist=0) at src/arch/armv7/bootblock_simple.c:37 +37 { +1: x/i $pc +=> 0x20244b8 <main>: push {r3, lr} +(gdb) +42 bootblock_mainboard_init(); +1: x/i $pc +=> 0x20244ba <main+2>: bl 0x2023c08 <bootblock_mainboard_init> +(gdb) +bootblock_mainboard_init () at src/mainboard/google/snow/bootblock.c:2124 +2124 { +1: x/i $pc +=> 0x2023c08 <bootblock_mainboard_init>: stmdb sp!, {r4, r5, r6, r7, r9, r10, r11, lr} +(gdb) +2127 i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); +1: x/i $pc +=> 0x2023c0c <bootblock_mainboard_init+4>: movs r1, #0 + +Note you are now debugging source, and pretty much all commands work. +*/ +#endif |