Patrick Georgi (patrick@georgi-clan.de) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/583
-gerrit
commit d8ba9b8c8bef6d696bef5ee06ebbd883c471d00b Author: Patrick Georgi patrick.georgi@secunet.com Date: Mon Jan 16 10:14:24 2012 +0100
libpayload: Refactor highlevel CMOS access
This will allow using libpayload functions to access CMOS data in template files in RAM or CBFS.
Change-Id: I323ed625e657cbdc1fae8c279a82ee578e83ad00 Signed-off-by: Patrick Georgi patrick.georgi@secunet.com --- payloads/libpayload/drivers/options.c | 68 ++++++++++++++++++++---------- payloads/libpayload/include/libpayload.h | 11 +++++ 2 files changed, 56 insertions(+), 23 deletions(-)
diff --git a/payloads/libpayload/drivers/options.c b/payloads/libpayload/drivers/options.c index e3f0847..1c2facc 100644 --- a/payloads/libpayload/drivers/options.c +++ b/payloads/libpayload/drivers/options.c @@ -30,7 +30,17 @@ #include <libpayload.h> #include <coreboot_tables.h>
-static int options_checksum_valid(void) +struct nvram_accessor *use_nvram = &(struct nvram_accessor) { + nvram_read, + nvram_write +}; + +struct cb_cmos_option_table *get_system_option_table() +{ + return phys_to_virt(lib_sysinfo.option_table); +} + +static int options_checksum_valid(const struct nvram_accessor *nvram) { int i; int range_start = lib_sysinfo.cmos_range_start / 8; @@ -39,15 +49,15 @@ static int options_checksum_valid(void) u16 checksum = 0, checksum_old;
for(i = range_start; i <= range_end; i++) { - checksum += nvram_read(i); + checksum += nvram->read(i); }
- checksum_old = ((nvram_read(checksum_location)<<8) | nvram_read(checksum_location+1)); + checksum_old = ((nvram->read(checksum_location)<<8) | nvram->read(checksum_location+1));
return (checksum_old == checksum); }
-void fix_options_checksum(void) +void fix_options_checksum_with(const struct nvram_accessor *nvram) { int i; int range_start = lib_sysinfo.cmos_range_start / 8; @@ -56,14 +66,19 @@ void fix_options_checksum(void) u16 checksum = 0;
for(i = range_start; i <= range_end; i++) { - checksum += nvram_read(i); + checksum += nvram->read(i); }
- nvram_write((checksum >> 8), checksum_location); - nvram_write((checksum & 0xff), checksum_location + 1); + nvram->write((checksum >> 8), checksum_location); + nvram->write((checksum & 0xff), checksum_location + 1); }
-static int get_cmos_value(u32 bitnum, u32 len, void *valptr) +void fix_options_checksum() +{ + fix_options_checksum_with(use_nvram); +} + +static int get_cmos_value(const struct nvram_accessor *nvram, u32 bitnum, u32 len, void *valptr) { u8 *value = (u8 *)valptr; int offs = 0; @@ -76,7 +91,7 @@ static int get_cmos_value(u32 bitnum, u32 len, void *valptr)
/* Handle single byte or less */ if(len <= 8) { - reg8 = nvram_read(addr); + reg8 = nvram->read(addr); reg8 >>= bit; value[0] = reg8 & ((1 << len) -1); return 0; @@ -85,13 +100,13 @@ static int get_cmos_value(u32 bitnum, u32 len, void *valptr) /* When handling more than a byte, copy whole bytes */ while (len > 0) { len -= 8; - value[offs++]=nvram_read(addr++); + value[offs++]=nvram->read(addr++); }
return 0; }
-static int set_cmos_value(u32 bitnum, u32 len, void *valptr) +static int set_cmos_value(const struct nvram_accessor *nvram, u32 bitnum, u32 len, void *valptr) { u8 *value = (u8 *)valptr; int offs = 0; @@ -104,17 +119,17 @@ static int set_cmos_value(u32 bitnum, u32 len, void *valptr)
/* Handle single byte or less */ if (len <= 8) { - reg8 = nvram_read(addr); + reg8 = nvram->read(addr); reg8 &= ~(((1 << len) - 1) << bit); reg8 |= (value[0] & ((1 << len) - 1)) << bit; - nvram_write(reg8, addr); + nvram->write(reg8, addr); return 0; }
/* When handling more than a byte, copy whole bytes */ while (len > 0) { len -= 8; - nvram_write(value[offs++], addr++); + nvram->write(value[offs++], addr++); }
return 0; @@ -139,14 +154,14 @@ static struct cb_cmos_entries *lookup_cmos_entry(struct cb_cmos_option_table *op return NULL; }
-int get_option_from(struct cb_cmos_option_table *option_table, void *dest, char *name) +int get_option_with(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, void *dest, char *name) { struct cb_cmos_entries *cmos_entry = lookup_cmos_entry(option_table, name); if (cmos_entry) { - if(get_cmos_value(cmos_entry->bit, cmos_entry->length, dest)) + if(get_cmos_value(nvram, cmos_entry->bit, cmos_entry->length, dest)) return 1;
- if(!options_checksum_valid()) + if(!options_checksum_valid(nvram)) return 1;
return 0; @@ -154,21 +169,28 @@ int get_option_from(struct cb_cmos_option_table *option_table, void *dest, char return 1; }
+int get_option_from(struct cb_cmos_option_table *option_table, void *dest, char *name) +{ + return get_option_with(use_nvram, option_table, dest, name); +} + int get_option(void *dest, char *name) { - struct cb_cmos_option_table *option_table = phys_to_virt(lib_sysinfo.option_table); - return get_option_from(option_table, dest, name); + return get_option_from(get_system_option_table(), dest, name); }
-int set_option(void *value, char *name) +int set_option_with(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, void *value, char *name) { - struct cb_cmos_option_table *option_table = phys_to_virt(lib_sysinfo.option_table); struct cb_cmos_entries *cmos_entry = lookup_cmos_entry(option_table, name); if (cmos_entry) { - set_cmos_value(cmos_entry->bit, cmos_entry->length, value); - fix_options_checksum(); + set_cmos_value(nvram, cmos_entry->bit, cmos_entry->length, value); + fix_options_checksum_with(nvram); return 0; } return 1; }
+int set_option(void *value, char *name) +{ + return set_option_with(use_nvram, get_system_option_table(), value, name); +} diff --git a/payloads/libpayload/include/libpayload.h b/payloads/libpayload/include/libpayload.h index d9f7d21..91156e5 100644 --- a/payloads/libpayload/include/libpayload.h +++ b/payloads/libpayload/include/libpayload.h @@ -194,9 +194,20 @@ void video_console_set_cursor(unsigned int cursorx, unsigned int cursory); /** @} */
/* drivers/option.c */ +struct nvram_accessor { + u8 (*read)(u8 reg); + void (*write)(u8 val, u8 reg); +}; + +extern struct nvram_accessor *use_nvram; + +struct cb_cmos_option_table *get_system_option_table(void); +void fix_options_checksum_with(const struct nvram_accessor *nvram); void fix_options_checksum(void); +int get_option_with(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, void *dest, char *name); int get_option_from(struct cb_cmos_option_table *option_table, void *dest, char *name); int get_option(void *dest, char *name); +int set_option_with(const struct nvram_accessor *nvram, struct cb_cmos_option_table *option_table, void *value, char *name); int set_option(void *value, char *name);
/**
-
Patrick Georgi