diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2013-06-17 12:26:17 +0200 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2013-06-17 17:00:10 +0200 |
| commit | 9839a385bb778a87fc00a046a77334709ac78930 (patch) | |
| tree | a7233e41160753e3696fbe1ddeb783cbf06340cb /src/mainboard/emulation/qemu-i440fx/northbridge.c | |
| parent | 44b11f2fe423a04641ca1059d2ba5a188412cdc7 (diff) | |
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>
Diffstat (limited to 'src/mainboard/emulation/qemu-i440fx/northbridge.c')
| -rw-r--r-- | src/mainboard/emulation/qemu-i440fx/northbridge.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/src/mainboard/emulation/qemu-i440fx/northbridge.c b/src/mainboard/emulation/qemu-i440fx/northbridge.c index ed372b6a9f..7cf5436c23 100644 --- a/src/mainboard/emulation/qemu-i440fx/northbridge.c +++ b/src/mainboard/emulation/qemu-i440fx/northbridge.c @@ -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; |