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x86: Add support for more than 8 MTRRs

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At present the mtrr command only support 8 MTRRs. Some SoCs have more than
that. Update the implementation to support up to 10. Read the number of
MTRRs dynamically instead.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass
2020-09-22 14:54:51 -06:00
committed by Bin Meng
parent 51af144eb7
commit 29d2d64ed5
3 changed files with 24 additions and 12 deletions
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9
cmd/x86/mtrr.c
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@@ -27,7 +27,7 @@ static void read_mtrrs(void *arg)
mtrr_read_all(info);
}
static int do_mtrr_list(int cpu_select)
static int do_mtrr_list(int reg_count, int cpu_select)
{
struct mtrr_info info;
int ret;
@@ -39,7 +39,7 @@ static int do_mtrr_list(int cpu_select)
ret = mp_run_on_cpus(cpu_select, read_mtrrs, &info);
if (ret)
return log_msg_ret("run", ret);
for (i = 0; i < MTRR_COUNT; i++) {
for (i = 0; i < reg_count; i++) {
const char *type = "Invalid";
uint64_t base, mask, size;
bool valid;
@@ -98,6 +98,7 @@ static int do_mtrr_set(int cpu_select, uint reg, int argc, char *const argv[])
static int do_mtrr(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
int reg_count = mtrr_get_var_count();
int cmd;
int cpu_select;
uint reg;
@@ -126,7 +127,7 @@ static int do_mtrr(struct cmd_tbl *cmdtp, int flag, int argc,
if (argc < 2)
return CMD_RET_USAGE;
reg = simple_strtoul(argv[1], NULL, 16);
if (reg >= MTRR_COUNT) {
if (reg >= reg_count) {
printf("Invalid register number\n");
return CMD_RET_USAGE;
}
@@ -145,7 +146,7 @@ static int do_mtrr(struct cmd_tbl *cmdtp, int flag, int argc,
if (!first)
printf("\n");
printf("CPU %d:\n", i);
ret = do_mtrr_list(i);
ret = do_mtrr_list(reg_count, i);
if (ret) {
printf("Failed to read CPU %d (err=%d)\n", i,
ret);