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nb/intel/i945: Reduce pcidev_on_root() calls 

Also removes one call for 0:2.0 (integrated graphics) that might be
disabled.

Change-Id: I494aa366030b77baf431f29ba331f13f7c567025
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/30881
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
This commit is contained in:
Nico Huber 2019-01-12 15:28:43 +01:00
parent 744d6bd638
commit 4e008c699b
1 changed files with 7 additions and 7 deletions
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14
src/northbridge/intel/i945/northbridge.c
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@ -66,6 +66,7 @@ static void mch_domain_read_resources(struct device *dev)
unsigned long long tomk, tomk_stolen;
uint64_t uma_memory_base = 0, uma_memory_size = 0;
uint64_t tseg_memory_base = 0, tseg_memory_size = 0;
struct device *const d0f0 = pcidev_on_root(0, 0);
pci_domain_read_resources(dev);
@ -75,17 +76,14 @@ static void mch_domain_read_resources(struct device *dev)
pci_tolm = find_pci_tolm(dev->link_list);
printk(BIOS_DEBUG, "pci_tolm: 0x%x\n", pci_tolm);
printk(BIOS_SPEW, "Base of stolen memory: 0x%08x\n",
pci_read_config32(pcidev_on_root(2, 0), BSM));
tolud = pci_read_config8(pcidev_on_root(0, 0), TOLUD);
tolud = pci_read_config8(d0f0, TOLUD);
printk(BIOS_SPEW, "Top of Low Used DRAM: 0x%08x\n", tolud << 24);
tomk = tolud << 14;
tomk_stolen = tomk;
/* Note: subtract IGD device and TSEG */
reg16 = pci_read_config16(pcidev_on_root(0, 0), GGC);
reg16 = pci_read_config16(d0f0, GGC);
if (!(reg16 & 2)) {
printk(BIOS_DEBUG, "IGD decoded, subtracting ");
int uma_size = decode_igd_memory_size((reg16 >> 4) & 7);
@ -96,10 +94,12 @@ static void mch_domain_read_resources(struct device *dev)
/* For reserving UMA memory in the memory map */
uma_memory_base = tomk_stolen * 1024ULL;
uma_memory_size = uma_size * 1024ULL;
printk(BIOS_SPEW, "Base of stolen memory: 0x%08x\n",
(unsigned int)uma_memory_base);
}
tseg_sizek = decode_tseg_size(pci_read_config8(pcidev_on_root(0, 0),
ESMRAMC)) >> 10;
tseg_sizek = decode_tseg_size(pci_read_config8(d0f0, ESMRAMC)) >> 10;
printk(BIOS_DEBUG, "TSEG decoded, subtracting %dM\n", tseg_sizek >> 10);
tomk_stolen -= tseg_sizek;
tseg_memory_base = tomk_stolen * 1024ULL;