Convert the top part of the DRAM init to use the driver model PCI API. Further work will complete the transformation.
Signed-off-by: Simon Glass sjg@chromium.org ---
arch/x86/cpu/ivybridge/sdram.c | 39 +++++++++++++++++++++++++-------------- 1 file changed, 25 insertions(+), 14 deletions(-)
diff --git a/arch/x86/cpu/ivybridge/sdram.c b/arch/x86/cpu/ivybridge/sdram.c index 4372a5c..5c1b788 100644 --- a/arch/x86/cpu/ivybridge/sdram.c +++ b/arch/x86/cpu/ivybridge/sdram.c @@ -495,8 +495,10 @@ static int add_memory_area(struct memory_info *info, * * This is a bit complicated since on x86 there are system memory holes all * over the place. We create a list of available memory blocks + * + * @dev: Northbridge device */ -static int sdram_find(pci_dev_t dev) +static int sdram_find(struct udevice *dev) { struct memory_info *info = &gd->arch.meminfo; uint32_t tseg_base, uma_size, tolud; @@ -505,6 +507,7 @@ static int sdram_find(pci_dev_t dev) uint64_t uma_memory_size; unsigned long long tomk; uint16_t ggc; + u32 val;
/* Total Memory 2GB example: * @@ -533,24 +536,27 @@ static int sdram_find(pci_dev_t dev) */
/* Top of Upper Usable DRAM, including remap */ - touud = x86_pci_read_config32(dev, TOUUD+4); - touud <<= 32; - touud |= x86_pci_read_config32(dev, TOUUD); + dm_pci_read_config32(dev, TOUUD + 4, &val); + touud = (uint64_t)val << 32; + dm_pci_read_config32(dev, TOUUD, &val); + touud |= val;
/* Top of Lower Usable DRAM */ - tolud = x86_pci_read_config32(dev, TOLUD); + dm_pci_read_config32(dev, TOLUD, &tolud);
/* Top of Memory - does not account for any UMA */ - tom = x86_pci_read_config32(dev, 0xa4); - tom <<= 32; - tom |= x86_pci_read_config32(dev, 0xa0); + dm_pci_read_config32(dev, 0xa4, &val); + tom = (uint64_t)val << 32; + dm_pci_read_config32(dev, 0xa0, &val); + tom |= val;
debug("TOUUD %llx TOLUD %08x TOM %llx\n", touud, tolud, tom);
/* ME UMA needs excluding if total memory <4GB */ - me_base = x86_pci_read_config32(dev, 0x74); - me_base <<= 32; - me_base |= x86_pci_read_config32(dev, 0x70); + dm_pci_read_config32(dev, 0x74, &val); + me_base = (uint64_t)val << 32; + dm_pci_read_config32(dev, 0x70, &val); + me_base |= val;
debug("MEBASE %llx\n", me_base);
@@ -568,7 +574,7 @@ static int sdram_find(pci_dev_t dev) }
/* Graphics memory comes next */ - ggc = x86_pci_read_config16(dev, GGC); + dm_pci_read_config16(dev, GGC, &ggc); if (!(ggc & 2)) { debug("IGD decoded, subtracting ");
@@ -588,7 +594,7 @@ static int sdram_find(pci_dev_t dev) }
/* Calculate TSEG size from its base which must be below GTT */ - tseg_base = x86_pci_read_config32(dev, 0xb8); + dm_pci_read_config32(dev, 0xb8, &tseg_base); uma_size = (uma_memory_base - tseg_base) >> 10; tomk -= uma_size; uma_memory_base = tomk * 1024ULL; @@ -723,7 +729,7 @@ int dram_init(void) { 0, 4, 0x0000 }, /* P13= Empty */ }, }; - pci_dev_t dev = PCI_BDF(0, 0, 0); + struct udevice *dev; int ret;
debug("Boot mode %d\n", gd->arch.pei_boot_mode); @@ -742,6 +748,11 @@ int dram_init(void)
post_code(POST_DRAM);
+ ret = uclass_first_device(UCLASS_NORTHBRIDGE, &dev); + if (ret) + return ret; + if (!dev) + return -ENODEV; ret = sdram_find(dev); if (ret) return ret;