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-rw-r--r--src/arch/i386/boot/acpi.c67
-rw-r--r--src/arch/i386/boot/tables.c9
2 files changed, 71 insertions, 5 deletions
diff --git a/src/arch/i386/boot/acpi.c b/src/arch/i386/boot/acpi.c
index ca9b66f744..6c837d0c8a 100644
--- a/src/arch/i386/boot/acpi.c
+++ b/src/arch/i386/boot/acpi.c
@@ -3,6 +3,10 @@
* written by Stefan Reinauer <stepan@openbios.org>
* (C) 2004 SUSE LINUX AG
*/
+/* ACPI FADT, FACS, and DSDT table support added by
+ * Nick Barker <nick.barker9@btinternet.com>, and those portions
+ * (C) Copyright 2004 Nick Barker
+ */
#include <console/console.h>
#include <string.h>
@@ -22,7 +26,15 @@
#define OEM_ID "LXBIOS"
#define ASLC "NONE"
-static u8 acpi_checksum(u8 *table, u32 length)
+
+// FIX ME - define needs declaring / setting in Config files
+#define HAVE_ACPI_FADT
+
+#ifdef HAVE_ACPI_FADT
+extern unsigned char AmlCode[];
+#endif
+
+u8 acpi_checksum(u8 *table, u32 length)
{
u8 ret=0;
while (length--) {
@@ -43,13 +55,15 @@ static void acpi_add_table(acpi_rsdt_t *rsdt, void *table)
for (i=0; i<8; i++) {
if(rsdt->entry[i]==0) {
rsdt->entry[i]=(u32)table;
+ /* fix length to stop kernel winging about invalid entries */
+ rsdt->header.length = sizeof(acpi_header_t) + (sizeof(u32) * (i+1));
/* fix checksum */
/* hope this won't get optimized away */
rsdt->header.checksum=0;
rsdt->header.checksum=acpi_checksum((u8 *)rsdt,
rsdt->header.length);
- printk_debug("ACPI: added table %d/8\n",i+1);
+ printk_debug("ACPI: added table %d/8 Length now %d\n",i+1,rsdt->header.length);
return;
}
}
@@ -181,6 +195,22 @@ static void acpi_create_hpet(acpi_hpet_t *hpet)
header->checksum = acpi_checksum((void *)hpet, sizeof(acpi_hpet_t));
}
+static void acpi_create_facs(acpi_facs_t *facs)
+{
+
+ memset( (void *)facs,0, sizeof(acpi_facs_t));
+
+ memcpy(facs->signature,"FACS",4);
+ facs->length = sizeof(acpi_facs_t);
+ facs->hardware_signature = 0;
+ facs->firmware_waking_vector = 0;
+ facs->global_lock = 0;
+ facs->flags = 0;
+ facs->x_firmware_waking_vector_l = 0;
+ facs->x_firmware_waking_vector_h = 0;
+ facs->version = 1;
+
+}
static void acpi_write_rsdt(acpi_rsdt_t *rsdt)
{
acpi_header_t *header=&(rsdt->header);
@@ -222,6 +252,9 @@ unsigned long write_acpi_tables(unsigned long start)
acpi_rsdt_t *rsdt;
acpi_hpet_t *hpet;
acpi_madt_t *madt;
+ acpi_fadt_t *fadt;
+ acpi_facs_t *facs;
+ acpi_header_t *dsdt;
/* Align ACPI tables to 16byte */
start = ( start + 0x0f ) & -0x10;
@@ -244,7 +277,6 @@ unsigned long write_acpi_tables(unsigned long start)
/*
* We explicitly add these tables later on:
*/
-#define HAVE_ACPI_HPET
#ifdef HAVE_ACPI_HPET
printk_debug("ACPI: * HPET\n");
@@ -263,6 +295,35 @@ unsigned long write_acpi_tables(unsigned long start)
#endif
+
+#ifdef HAVE_ACPI_FADT
+
+
+ printk_debug("ACPI: * FACS\n");
+ facs = (acpi_facs_t *) current;
+ current += sizeof(acpi_facs_t);
+ acpi_create_facs(facs);
+
+
+ dsdt = (acpi_header_t *)current;
+ current += ((acpi_header_t *)AmlCode)->length;
+ memcpy((void *)dsdt,(void *)AmlCode, ((acpi_header_t *)AmlCode)->length);
+ dsdt->checksum = 0; // don't trust intel iasl compiler to get this right
+ dsdt->checksum = acpi_checksum(dsdt,dsdt->length);
+ printk_debug("ACPI: * DSDT @ %08x Length %x\n",dsdt,dsdt->length);
+ printk_debug("ACPI: * FADT\n");
+
+ fadt = (acpi_fadt_t *) current;
+ current += sizeof(acpi_fadt_t);
+
+ acpi_create_fadt(fadt,facs,dsdt);
+ acpi_add_table(rsdt,fadt);
+
+
+#endif
+
+
+
printk_info("ACPI: done.\n");
return current;
}
diff --git a/src/arch/i386/boot/tables.c b/src/arch/i386/boot/tables.c
index 08bb7a3401..18e271db8c 100644
--- a/src/arch/i386/boot/tables.c
+++ b/src/arch/i386/boot/tables.c
@@ -60,8 +60,13 @@ struct lb_memory *write_tables(struct mem_range *mem, unsigned long *processor_m
low_table_end = write_smp_table(low_table_end, processor_map);
/* Write ACPI tables */
- low_table_end = write_acpi_tables(low_table_end);
-
+ /* write them in the rom area because DSDT can be large (8K on epia-m) which
+ * pushes linuxbios table out of first 4K if set up in low table area
+ */
+
+ rom_table_end = write_acpi_tables(rom_table_end);
+ rom_table_end = (rom_table_end+1023) & ~1023;
+
/* Don't write anything in the traditional x86 BIOS data segment */
if (low_table_end < 0x500) {
low_table_end = 0x500;