Now that platform-specific ACPI global NVS is added, pack it into
ACPI table and get its address fixed up.
Signed-off-by: Bin Meng <bmeng...@gmail.com>
---
arch/x86/include/asm/acpi_table.h | 4 ++++
.../x86/include/asm/arch-baytrail/acpi/platform.asl | 3 +++
arch/x86/include/asm/arch-quark/acpi/platform.asl | 3 +++
arch/x86/lib/acpi_table.c | 21 +++++++++++++++++++++
doc/README.x86 | 2 --
5 files changed, 31 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/acpi_table.h
b/arch/x86/include/asm/acpi_table.h
index 56aa282..caff4d8 100644
--- a/arch/x86/include/asm/acpi_table.h
+++ b/arch/x86/include/asm/acpi_table.h
@@ -299,6 +299,9 @@ struct acpi_mcfg_mmconfig {
/* PM1_CNT bit defines */
#define PM1_CNT_SCI_EN (1 << 0)
+/* ACPI global NVS structure */
+struct acpi_global_nvs;
+
/* These can be used by the target port */
void acpi_fill_header(struct acpi_table_header *header, char *signature);
@@ -312,4 +315,5 @@ int acpi_create_madt_irqoverride(struct
acpi_madt_irqoverride *irqoverride,
int acpi_create_madt_lapic_nmi(struct acpi_madt_lapic_nmi *lapic_nmi,
u8 cpu, u16 flags, u8 lint);
u32 acpi_fill_madt(u32 current);
+void acpi_create_gnvs(struct acpi_global_nvs *gnvs);
u32 write_acpi_tables(u32 start);
diff --git a/arch/x86/include/asm/arch-baytrail/acpi/platform.asl
b/arch/x86/include/asm/arch-baytrail/acpi/platform.asl
index 6bc82ec..a80d2c0 100644
--- a/arch/x86/include/asm/arch-baytrail/acpi/platform.asl
+++ b/arch/x86/include/asm/arch-baytrail/acpi/platform.asl
@@ -22,6 +22,9 @@ Method(_WAK, 1)
Return (Package() {0, 0})
}
+/* ACPI global NVS */
+#include "global_nvs.asl"
+
/* TODO: add CPU ASL support */
Scope (\_SB)
diff --git a/arch/x86/include/asm/arch-quark/acpi/platform.asl
b/arch/x86/include/asm/arch-quark/acpi/platform.asl
index bd72842..1ecf153 100644
--- a/arch/x86/include/asm/arch-quark/acpi/platform.asl
+++ b/arch/x86/include/asm/arch-quark/acpi/platform.asl
@@ -22,6 +22,9 @@ Method(_WAK, 1)
Return (Package() {0, 0})
}
+/* ACPI global NVS */
+#include "global_nvs.asl"
+
/* TODO: add CPU ASL support */
Scope (\_SB)
diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c
index bb71286..2e4f3ab 100644
--- a/arch/x86/lib/acpi_table.c
+++ b/arch/x86/lib/acpi_table.c
@@ -15,6 +15,7 @@
#include <asm/io.h>
#include <asm/lapic.h>
#include <asm/tables.h>
+#include <asm/arch/global_nvs.h>
/*
* IASL compiles the dsdt entries and writes the hex values
@@ -336,6 +337,7 @@ u32 write_acpi_tables(u32 start)
struct acpi_fadt *fadt;
struct acpi_mcfg *mcfg;
struct acpi_madt *madt;
+ int i;
current = start;
@@ -383,6 +385,25 @@ u32 write_acpi_tables(u32 start)
current += dsdt->length - sizeof(struct acpi_table_header);
current = ALIGN(current, 16);
+ /* Pack GNVS into the ACPI table area */
+ for (i = 0; i < dsdt->length; i++) {
+ u32 gnvs = (u32)dsdt + i;
+ if (*(u32 *)gnvs == 0xdeadbeef) {
+ debug("Fix up global NVS in DSDT to 0x%08x\n", current);
+ *(u32 *)gnvs = current;
+ break;
+ }
+ }
+
+ /* Update DSDT checksum since we patched the GNVS address */
+ dsdt->checksum = 0;
+ dsdt->checksum = table_compute_checksum((void *)dsdt, dsdt->length);
+
+ /* Fill in platform-specific global NVS variables */
+ acpi_create_gnvs((struct acpi_global_nvs *)current);
+ current += sizeof(struct acpi_global_nvs);
+ current = ALIGN(current, 16);
+
debug("ACPI: * FADT\n");
fadt = (struct acpi_fadt *)current;
current += sizeof(struct acpi_fadt);
diff --git a/doc/README.x86 b/doc/README.x86
index a548b54..7d694b1 100644
--- a/doc/README.x86
+++ b/doc/README.x86
@@ -1020,8 +1020,6 @@ Features not supported so far (to make it a complete ACPI
solution):
* S3 (Suspend to RAM), S4 (Suspend to Disk).
Features that are optional:
- * ACPI global NVS support. We may need it to simplify ASL code logic if
- utilizing NVS variables. Most likely we will need this sooner or later.
* Dynamic AML bytecodes insertion at run-time. We may need this to support
SSDT table generation and DSDT fix up.
* SMI support. Since U-Boot is a modern bootloader, we don't want to bring
--
2.7.4
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