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qemu: add support for memory above 4G 

Change-Id: Ic83f55d01b29b43028e3b363749d64b927db5489
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-on: http://review.coreboot.org/3492
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
Gerd Hoffmann 2013-06-17 12:26:17 +02:00 committed by Ronald G. Minnich
parent 44b11f2fe4
commit 9839a385bb
2 changed files with 23 additions and 2 deletions
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5
src/mainboard/emulation/qemu-i440fx/memory.c
View File

@ -21,9 +21,14 @@
#define CMOS_ADDR_PORT 0x70
#define CMOS_DATA_PORT 0x71
#define HIGH_RAM_ADDR 0x35
#define LOW_RAM_ADDR 0x34
#define HIGH_HIGHRAM_ADDR 0x5d
#define MID_HIGHRAM_ADDR 0x5c
#define LOW_HIGHRAM_ADDR 0x5b
static unsigned long qemu_get_memory_size(void)
{
unsigned long tomk;

20
src/mainboard/emulation/qemu-i440fx/northbridge.c
View File

@ -16,6 +16,18 @@
#include "memory.c"
static unsigned long qemu_get_high_memory_size(void)
{
unsigned long high;
outb (HIGH_HIGHRAM_ADDR, CMOS_ADDR_PORT);
high = ((unsigned long) inb(CMOS_DATA_PORT)) << 22;
outb (MID_HIGHRAM_ADDR, CMOS_ADDR_PORT);
high |= ((unsigned long) inb(CMOS_DATA_PORT)) << 14;
outb (LOW_HIGHRAM_ADDR, CMOS_ADDR_PORT);
high |= ((unsigned long) inb(CMOS_DATA_PORT)) << 6;
return high;
}
static void cpu_pci_domain_set_resources(device_t dev)
{
assign_resources(dev->link_list);
@ -24,18 +36,22 @@ static void cpu_pci_domain_set_resources(device_t dev)
static void cpu_pci_domain_read_resources(struct device *dev)
{
struct resource *res;
unsigned long tomk = 0;
unsigned long tomk = 0, high;
int idx = 10;
pci_domain_read_resources(dev);
tomk = qemu_get_memory_size();
printk(BIOS_DEBUG, "Detected %lu MiB RAM.\n", tomk / 1024);
high = qemu_get_high_memory_size();
printk(BIOS_DEBUG, "Detected %lu MiB RAM below 4G.\n", tomk / 1024);
printk(BIOS_DEBUG, "Detected %lu MiB RAM above 4G.\n", high / 1024);
/* Report the memory regions. */
idx = 10;
ram_resource(dev, idx++, 0, 640);
ram_resource(dev, idx++, 768, tomk - 768);
if (high)
ram_resource(dev, idx++, 4 * 1024 * 1024, high);
/* Leave some space for ACPI, PIRQ and MP tables */
high_tables_base = (tomk * 1024) - HIGH_MEMORY_SIZE;