diff options
| author | Nico Huber <nico.h@gmx.de> | 2021-01-17 21:50:55 +0100 |
|---|---|---|
| committer | Nico Huber <nico.h@gmx.de> | 2021-01-18 23:01:28 +0000 |
| commit | 58ba83fe74238cc79d858411bdc3e3ba2e842b12 (patch) | |
| tree | 5bca14cca9e0017491a7f428cee9d73b64ffcdc9 /src/northbridge | |
| parent | 5fde1b7669b8ebd28446b869c2862964a36b1c1e (diff) | |
nb/intel/gm45: Reserve MMIO and firmware memory below 1MiB
It looks like we didn't care to reserve the VGA MMIO (a & b segments)
and the c..f segments, initially. It was probably never needed until
the new resource allocator that will make use of any unclaimed space.
Change-Id: Iebdae64914d9f8301cafc67a5aba933c11294707
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49603
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/intel/gm45/northbridge.c | 33 |
1 files changed, 18 insertions, 15 deletions
diff --git a/src/northbridge/intel/gm45/northbridge.c b/src/northbridge/intel/gm45/northbridge.c index 8c27d50eb6..3458cbfefa 100644 --- a/src/northbridge/intel/gm45/northbridge.c +++ b/src/northbridge/intel/gm45/northbridge.c @@ -14,13 +14,6 @@ #include "chip.h" #include "gm45.h" -/* Reserve segments A and B: - * - * 0xa0000 - 0xbffff: legacy VGA - */ -static const int legacy_hole_base_k = 0xa0000 / 1024; -static const int legacy_hole_size_k = 128; - int decode_pcie_bar(u32 *const base, u32 *const len) { *base = 0; @@ -133,10 +126,20 @@ static void mch_domain_read_resources(struct device *dev) printk(BIOS_INFO, "Available memory below 4GB: %uM\n", tomk >> 10); - /* Report the memory regions */ - ram_resource(dev, 3, 0, legacy_hole_base_k); - ram_resource(dev, 4, legacy_hole_base_k + legacy_hole_size_k, - (tomk - (legacy_hole_base_k + legacy_hole_size_k))); + /* Report lowest memory region */ + ram_resource(dev, 3, 0, 0xa0000 / KiB); + + /* + * Reserve everything between A segment and 1MB: + * + * 0xa0000 - 0xbffff: Legacy VGA + * 0xc0000 - 0xfffff: RAM + */ + mmio_resource(dev, 4, 0xa0000 / KiB, (0xc0000 - 0xa0000) / KiB); + reserved_ram_resource(dev, 5, 0xc0000 / KiB, (1*MiB - 0xc0000) / KiB); + + /* Report < 4GB memory */ + ram_resource(dev, 6, 1*MiB / KiB, tomk - 1*MiB / KiB); /* * If >= 4GB installed then memory from TOLUD to 4GB @@ -144,7 +147,7 @@ static void mch_domain_read_resources(struct device *dev) */ touud >>= 10; /* Convert to KB */ if (touud > 4096 * 1024) { - ram_resource(dev, 5, 4096 * 1024, touud - (4096 * 1024)); + ram_resource(dev, 7, 4096 * 1024, touud - (4096 * 1024)); printk(BIOS_INFO, "Available memory above 4GB: %lluM\n", (touud >> 10) - 4096); } @@ -152,12 +155,12 @@ static void mch_domain_read_resources(struct device *dev) printk(BIOS_DEBUG, "Adding UMA memory area base=0x%llx " "size=0x%llx\n", ((u64)tomk) << 10, ((u64)uma_sizek) << 10); /* Don't use uma_resource() as our UMA touches the PCI hole. */ - fixed_mem_resource(dev, 6, tomk, uma_sizek, IORESOURCE_RESERVE); + fixed_mem_resource(dev, 8, tomk, uma_sizek, IORESOURCE_RESERVE); if (decode_pcie_bar(&pcie_config_base, &pcie_config_size)) { printk(BIOS_DEBUG, "Adding PCIe config bar base=0x%08x " "size=0x%x\n", pcie_config_base, pcie_config_size); - fixed_mem_resource(dev, 7, pcie_config_base >> 10, + fixed_mem_resource(dev, 9, pcie_config_base >> 10, pcie_config_size >> 10, IORESOURCE_RESERVE); } } @@ -167,7 +170,7 @@ static void mch_domain_set_resources(struct device *dev) struct resource *resource; int i; - for (i = 3; i < 8; ++i) { + for (i = 3; i <= 9; ++i) { /* Report read resources. */ resource = probe_resource(dev, i); if (resource) |