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smbios: Track the end of the string table

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Add a new member to the context struct which tracks the end of the string
table. This allows us to avoid recalculating this at the end.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2021-02-04 21:17:19 -07:00 committed by Bin Meng
parent 0c95fff342
commit fd3b826da8
1 changed files with 15 additions and 17 deletions
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32
lib/smbios.c
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@ -24,11 +24,15 @@
* @dev: sysinfo device to use (NULL if none)
* @eos: end-of-string pointer for the table being processed. This is set
* up when we start processing a table
* @next_ptr: pointer to the start of the next string to be added. When the
* table is nopt empty, this points to the byte after the \0 of the
* previous string.
*/
struct smbios_ctx {
ofnode node;
struct udevice *dev;
char *eos;
char *next_ptr;
};
/**
@ -77,6 +81,7 @@ static int smbios_add_string(struct smbios_ctx *ctx, const char *str)
strcpy(p, str);
p += strlen(str);
*p++ = '\0';
ctx->next_ptr = p;
*p++ = '\0';
return i;
@ -113,6 +118,7 @@ static int smbios_add_prop(struct smbios_ctx *ctx, const char *prop)
static void smbios_set_eos(struct smbios_ctx *ctx, char *eos)
{
ctx->eos = eos;
ctx->next_ptr = eos;
}
/**
@ -120,21 +126,13 @@ static void smbios_set_eos(struct smbios_ctx *ctx, char *eos)
*
* This computes the size of the string area including the string terminator.
*
* @start: string area start address
* @ctx: SMBIOS context
* @return: string area size
*/
static int smbios_string_table_len(char *start)
static int smbios_string_table_len(const struct smbios_ctx *ctx)
{
char *p = start;
int i, len = 0;
while (*p) {
i = strlen(p) + 1;
p += i;
len += i;
}
return len + 1;
/* Allow for the final \0 after all strings */
return (ctx->next_ptr + 1) - ctx->eos;
}
static int smbios_write_type0(ulong *current, int handle,
@ -170,7 +168,7 @@ static int smbios_write_type0(ulong *current, int handle,
t->ec_major_release = 0xff;
t->ec_minor_release = 0xff;
len = t->length + smbios_string_table_len(t->eos);
len = t->length + smbios_string_table_len(ctx);
*current += len;
unmap_sysmem(t);
@ -200,7 +198,7 @@ static int smbios_write_type1(ulong *current, int handle,
t->sku_number = smbios_add_prop(ctx, "sku");
t->family = smbios_add_prop(ctx, "family");
len = t->length + smbios_string_table_len(t->eos);
len = t->length + smbios_string_table_len(ctx);
*current += len;
unmap_sysmem(t);
@ -223,7 +221,7 @@ static int smbios_write_type2(ulong *current, int handle,
t->feature_flags = SMBIOS_BOARD_FEATURE_HOSTING;
t->board_type = SMBIOS_BOARD_MOTHERBOARD;
len = t->length + smbios_string_table_len(t->eos);
len = t->length + smbios_string_table_len(ctx);
*current += len;
unmap_sysmem(t);
@ -247,7 +245,7 @@ static int smbios_write_type3(ulong *current, int handle,
t->thermal_state = SMBIOS_STATE_SAFE;
t->security_status = SMBIOS_SECURITY_NONE;
len = t->length + smbios_string_table_len(t->eos);
len = t->length + smbios_string_table_len(ctx);
*current += len;
unmap_sysmem(t);
@ -306,7 +304,7 @@ static int smbios_write_type4(ulong *current, int handle,
t->l3_cache_handle = 0xffff;
t->processor_family2 = t->processor_family;
len = t->length + smbios_string_table_len(t->eos);
len = t->length + smbios_string_table_len(ctx);
*current += len;
unmap_sysmem(t);