From 425973cf42ad5c298dd2f501d8b9437c60ae9b6f Mon Sep 17 00:00:00 2001 From: Nico Huber Date: Tue, 13 Nov 2012 17:11:01 +0100 Subject: libpayload: Always use virtual pointers in struct sysinfo_t We had mixed virtual and physical pointers in struct sysinfo_t. Some being virtual by accident which led to problems when we tried to reinitialize lib_sysinfo after relocating FILO (to get intentionally virtual pointers valid again). I guess this didn't cause much trouble before, as lib_get_sysinfo() was always called with physical addresses being equal to their virtual counterparts. For FILO, two possibilities seem practical: Either, have all pointers in struct sysinfo_t physical, so relocation doesn't hurt. Or, have all pointers virtual and call lib_get_sysinfo() again after relocation. This patch goes the latter way, changing the following pointers for situations where virtual pointers differ from physical: .extra_version .build .compile_time .compile_by .compile_host .compile_domain .compiler .linker .assembler .cb_version .vdat_addr .tstamp_table .cbmem_cons .mrc_cache We could also just correct the accidentally virtual pointers. But, IMO, this would lower the risk of future confusion. Note 1: Looks like .version gets never set. Note 2: .option_table and .framebuffer were virtual pointers but treated like physical ones. Even in FILO, this led to no problems as they were set before relocation. Change-Id: I4c456f56f049d9f8fc40e62520b1d8ec3dad48f8 Signed-off-by: Nico Huber Reviewed-on: http://review.coreboot.org/1855 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer --- payloads/libpayload/arch/i386/coreboot.c | 21 +++++++++------------ payloads/libpayload/drivers/options.c | 2 +- payloads/libpayload/drivers/video/corebootfb.c | 6 +++--- 3 files changed, 13 insertions(+), 16 deletions(-) (limited to 'payloads') diff --git a/payloads/libpayload/arch/i386/coreboot.c b/payloads/libpayload/arch/i386/coreboot.c index 5037011efa..fc22d9a05a 100644 --- a/payloads/libpayload/arch/i386/coreboot.c +++ b/payloads/libpayload/arch/i386/coreboot.c @@ -78,12 +78,6 @@ static void cb_parse_serial(void *ptr, struct sysinfo_t *info) info->serial = ((struct cb_serial *)ptr); } -static void cb_parse_version(void *ptr, struct sysinfo_t *info) -{ - struct cb_string *ver = ptr; - info->cb_version = (char *)ver->string; -} - #ifdef CONFIG_CHROMEOS static void cb_parse_vbnv(unsigned char *ptr, struct sysinfo_t *info) { @@ -109,24 +103,27 @@ static void cb_parse_vdat(unsigned char *ptr, struct sysinfo_t *info) { struct cb_vdat *vdat = (struct cb_vdat *) ptr; - info->vdat_addr = vdat->vdat_addr; + info->vdat_addr = phys_to_virt(vdat->vdat_addr); info->vdat_size = vdat->vdat_size; } #endif static void cb_parse_tstamp(unsigned char *ptr, struct sysinfo_t *info) { - info->tstamp_table = ((struct cb_cbmem_tab *)ptr)->cbmem_tab; + struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr; + info->tstamp_table = phys_to_virt(cbmem->cbmem_tab); } static void cb_parse_cbmem_cons(unsigned char *ptr, struct sysinfo_t *info) { - info->cbmem_cons = ((struct cb_cbmem_tab *)ptr)->cbmem_tab; + struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr; + info->cbmem_cons = phys_to_virt(cbmem->cbmem_tab); } static void cb_parse_mrc_cache(unsigned char *ptr, struct sysinfo_t *info) { - info->mrc_cache = ((struct cb_cbmem_tab *)ptr)->cbmem_tab; + struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr; + info->mrc_cache = phys_to_virt(cbmem->cbmem_tab); } #ifdef CONFIG_NVRAM @@ -153,7 +150,7 @@ static void cb_parse_framebuffer(void *ptr, struct sysinfo_t *info) static void cb_parse_string(unsigned char *ptr, char **info) { - *info = (char *)((struct cb_string *)ptr)->string; + *info = (char *)phys_to_virt(((struct cb_string *)ptr)->string); } static int cb_parse_header(void *addr, int len, struct sysinfo_t *info) @@ -205,7 +202,7 @@ static int cb_parse_header(void *addr, int len, struct sysinfo_t *info) cb_parse_serial(ptr, info); break; case CB_TAG_VERSION: - cb_parse_version(ptr, info); + cb_parse_string(ptr, &info->cb_version); break; case CB_TAG_EXTRA_VERSION: cb_parse_string(ptr, &info->extra_version); diff --git a/payloads/libpayload/drivers/options.c b/payloads/libpayload/drivers/options.c index a01f977620..d15d81be57 100644 --- a/payloads/libpayload/drivers/options.c +++ b/payloads/libpayload/drivers/options.c @@ -54,7 +54,7 @@ struct nvram_accessor *use_mem = &(struct nvram_accessor) { struct cb_cmos_option_table *get_system_option_table(void) { - return phys_to_virt(lib_sysinfo.option_table); + return lib_sysinfo.option_table; } int options_checksum_valid(const struct nvram_accessor *nvram) diff --git a/payloads/libpayload/drivers/video/corebootfb.c b/payloads/libpayload/drivers/video/corebootfb.c index 0fb1740785..5672d1f375 100644 --- a/payloads/libpayload/drivers/video/corebootfb.c +++ b/payloads/libpayload/drivers/video/corebootfb.c @@ -63,11 +63,11 @@ static const u32 vga_colors[] = { }; /* Addresses for the various components */ -static unsigned long fbinfo; +static struct cb_framebuffer *fbinfo; static unsigned long fbaddr; static unsigned long chars; -#define FI ((struct cb_framebuffer *) phys_to_virt(fbinfo)) +#define FI (fbinfo) #define FB ((unsigned char *) phys_to_virt(fbaddr)) #define CHARS ((unsigned short *) phys_to_virt(chars)) @@ -233,7 +233,7 @@ static int corebootfb_init(void) if (lib_sysinfo.framebuffer == NULL) return -1; - fbinfo = (unsigned long)lib_sysinfo.framebuffer; + fbinfo = lib_sysinfo.framebuffer; fbaddr = FI->physical_address; -- cgit v1.2.3