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coreboot-kgpe-d16
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flashrom: Check all mmap() calls and print helpful Linux error message. 

Signed-off-by: Peter Stuge <peter@stuge.se>
Acked-by: Peter Stuge <peter@stuge.se>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3890 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Peter Stuge 2009-01-23 05:23:06 +00:00
parent 8a681b1d84
commit 2e5481356f
4 changed files with 19 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
util/flashrom/cbtable.c
View File

@ -191,6 +191,7 @@ int coreboot_init(void)
0x00000000);
if (low_1MB == MAP_FAILED) {
perror("Can't mmap memory using " MEM_DEV);
mmap_errmsg();
exit(-2);
}
lb_table = 0;

4
util/flashrom/chipset_enable.c
View File

@ -220,6 +220,7 @@ static int enable_flash_vt8237s_spi(struct pci_dev *dev, const char *name)
if (spibar == MAP_FAILED) {
perror("Can't mmap memory using " MEM_DEV);
mmap_errmsg();
exit(1);
}
@ -255,6 +256,7 @@ static int enable_flash_ich_dc_spi(struct pci_dev *dev, const char *name,
(off_t) tmp);
if (rcrb == MAP_FAILED) {
perror("Can't mmap memory using " MEM_DEV);
mmap_errmsg();
exit(1);
}
@ -681,6 +683,7 @@ static int enable_flash_sb600(struct pci_dev *dev, const char *name)
fd_mem, (off_t)tmp);
if (sb600_spibar == MAP_FAILED) {
perror("Can't mmap memory using " MEM_DEV);
mmap_errmsg();
exit(1);
}
sb600_spibar += low_bits;
@ -837,6 +840,7 @@ static int get_flashbase_sc520(struct pci_dev *dev, const char *name)
if (mmcr == MAP_FAILED) {
perror("Can't mmap Elan SC520 specific registers using " MEM_DEV);
mmap_errmsg();
exit(1);
}

1
util/flashrom/flash.h
View File

@ -480,6 +480,7 @@ extern int verbose;
#define printf_debug(x...) { if (verbose) printf(x); }
/* flashrom.c */
void mmap_errmsg();
int map_flash_registers(struct flashchip *flash);
/* layout.c */

20
util/flashrom/flashrom.c
View File

@ -84,6 +84,17 @@ struct pci_dev *pci_card_find(uint16_t vendor, uint16_t device,
return NULL;
}
void mmap_errmsg()
{
if (EINVAL == errno) {
fprintf(stderr, "In Linux this error can be caused by the CONFIG_NONPROMISC_DEVMEM (<2.6.27),\n");
fprintf(stderr, "CONFIG_STRICT_DEVMEM (>=2.6.27) and CONFIG_X86_PAT kernel options.\n");
fprintf(stderr, "Please check if either is enabled in your kernel before reporting a failure.\n");
fprintf(stderr, "You can override CONFIG_X86_PAT at boot with the nopat kernel parameter but\n");
fprintf(stderr, "disabling the other option unfortunately requires a kernel recompile. Sorry!\n");
}
}
int map_flash_registers(struct flashchip *flash)
{
volatile uint8_t *registers;
@ -94,6 +105,7 @@ int map_flash_registers(struct flashchip *flash)
if (registers == MAP_FAILED) {
perror("Can't mmap registers using " MEM_DEV);
mmap_errmsg();
exit(1);
}
flash->virtual_registers = registers;
@ -139,13 +151,7 @@ struct flashchip *probe_flash(struct flashchip *first_flash, int force)
fd_mem, (off_t) base);
if (bios == MAP_FAILED) {
perror("Can't mmap memory using " MEM_DEV);
if (EINVAL == errno) {
fprintf(stderr, "In Linux this error can be caused by the CONFIG_NONPROMISC_DEVMEM (<2.6.27),\n");
fprintf(stderr, "CONFIG_STRICT_DEVMEM (>=2.6.27) and CONFIG_X86_PAT kernel options.\n");
fprintf(stderr, "Please check if either is enabled in your kernel before reporting a failure.\n");
fprintf(stderr, "You can override CONFIG_X86_PAT at boot with the nopat kernel parameter but\n");
fprintf(stderr, "disabling the other option unfortunately requires a kernel recompile. Sorry!\n");
}
mmap_errmsg();
exit(1);
}
flash->virtual_memory = bios;