[PATCH 05/13] x86: coreboot: Collect the address of the ACPI tables
Simon Glass
sjg at chromium.org
Mon Feb 20 20:49:19 CET 2023
Pick this up from the sysinfo tables and display it with the cbsysinfo
command. This allows the 'acpi list' command to work when booting from
coreboot.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
arch/x86/include/asm/cb_sysinfo.h | 2 ++
arch/x86/include/asm/coreboot_tables.h | 2 ++
arch/x86/lib/coreboot/cb_sysinfo.c | 11 +++++++++++
cmd/x86/cbsysinfo.c | 1 +
4 files changed, 16 insertions(+)
diff --git a/arch/x86/include/asm/cb_sysinfo.h b/arch/x86/include/asm/cb_sysinfo.h
index 0201ac6b03a..6b266149cf6 100644
--- a/arch/x86/include/asm/cb_sysinfo.h
+++ b/arch/x86/include/asm/cb_sysinfo.h
@@ -133,6 +133,7 @@
* @mtc_size: Size of MTC region
* @chromeos_vpd: Chromium OS Vital Product Data region, typically NULL, meaning
* not used
+ * @rsdp: Pointer to ACPI RSDP table
*/
struct sysinfo_t {
unsigned int cpu_khz;
@@ -211,6 +212,7 @@ struct sysinfo_t {
u64 mtc_start;
u32 mtc_size;
void *chromeos_vpd;
+ void *rsdp;
};
extern struct sysinfo_t lib_sysinfo;
diff --git a/arch/x86/include/asm/coreboot_tables.h b/arch/x86/include/asm/coreboot_tables.h
index f131de56a40..2d6f3db3a5f 100644
--- a/arch/x86/include/asm/coreboot_tables.h
+++ b/arch/x86/include/asm/coreboot_tables.h
@@ -422,6 +422,8 @@ struct cb_tsc_info {
#define CB_TAG_SERIALNO 0x002a
#define CB_MAX_SERIALNO_LENGTH 32
+#define CB_TAG_ACPI_RSDP 0x0043
+
#define CB_TAG_CMOS_OPTION_TABLE 0x00c8
struct cb_cmos_option_table {
diff --git a/arch/x86/lib/coreboot/cb_sysinfo.c b/arch/x86/lib/coreboot/cb_sysinfo.c
index 748fa4ee53b..a11a2587f66 100644
--- a/arch/x86/lib/coreboot/cb_sysinfo.c
+++ b/arch/x86/lib/coreboot/cb_sysinfo.c
@@ -264,6 +264,13 @@ static void cb_parse_mrc_cache(void *ptr, struct sysinfo_t *info)
info->mrc_cache = map_sysmem(cbmem->cbmem_tab, 0);
}
+static void cb_parse_acpi_rsdp(void *ptr, struct sysinfo_t *info)
+{
+ struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr;
+
+ info->rsdp = map_sysmem(cbmem->cbmem_tab, 0);
+}
+
__weak void cb_parse_unhandled(u32 tag, unsigned char *ptr)
{
}
@@ -428,6 +435,9 @@ static int cb_parse_header(void *addr, int len, struct sysinfo_t *info)
case CB_TAG_MRC_CACHE:
cb_parse_mrc_cache(rec, info);
break;
+ case CB_TAG_ACPI_RSDP:
+ cb_parse_acpi_rsdp(rec, info);
+ break;
default:
cb_parse_unhandled(rec->tag, ptr);
break;
@@ -454,6 +464,7 @@ int get_coreboot_info(struct sysinfo_t *info)
if (!ret)
return -ENOENT;
gd->arch.coreboot_table = addr;
+ gd_set_acpi_start(map_to_sysmem(info->rsdp));
gd->flags |= GD_FLG_SKIP_LL_INIT;
return 0;
diff --git a/cmd/x86/cbsysinfo.c b/cmd/x86/cbsysinfo.c
index 34fdaf5b1b1..07570b00c9a 100644
--- a/cmd/x86/cbsysinfo.c
+++ b/cmd/x86/cbsysinfo.c
@@ -363,6 +363,7 @@ static void show_table(struct sysinfo_t *info, bool verbose)
print_hex("MTC size", info->mtc_size);
print_ptr("Chrome OS VPD", info->chromeos_vpd);
+ print_ptr("RSDP", info->rsdp);
}
static int do_cbsysinfo(struct cmd_tbl *cmdtp, int flag, int argc,
--
2.39.2.637.g21b0678d19-goog
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