diff options
| author | Angel Pons <th3fanbus@gmail.com> | 2020-08-03 14:18:41 +0200 |
|---|---|---|
| committer | Angel Pons <th3fanbus@gmail.com> | 2020-08-06 07:25:25 +0000 |
| commit | 20905cfe26448166f3224bb59b38dba6cc132274 (patch) | |
| tree | 3b9773d835897238f5bcfce04a771a2d52529a05 | |
| parent | 96b32f194bf6ed4de7d495acc0c50106cf3c72d7 (diff) | |
nb/intel/sandybridge: Refactor `get_pcie_bar`
Turn it into `decode_pcie_bar`, taken from gm45.
Change-Id: Id1c2cfbcac1a798d046beced790930511dc97972
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44121
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
| -rw-r--r-- | src/northbridge/intel/sandybridge/northbridge.c | 33 |
1 files changed, 17 insertions, 16 deletions
diff --git a/src/northbridge/intel/sandybridge/northbridge.c b/src/northbridge/intel/sandybridge/northbridge.c index 1d20a4b57a..8f1db9791b 100644 --- a/src/northbridge/intel/sandybridge/northbridge.c +++ b/src/northbridge/intel/sandybridge/northbridge.c @@ -2,6 +2,7 @@ #include <console/console.h> #include <acpi/acpi.h> +#include <commonlib/helpers.h> #include <device/pci_ops.h> #include <stdint.h> #include <delay.h> @@ -39,18 +40,16 @@ int bridge_silicon_revision(void) static const int legacy_hole_base_k = 0xa0000 / 1024; static const int legacy_hole_size_k = 384; -static int get_pcie_bar(u32 *base) +static int decode_pcie_bar(u32 *const base, u32 *const len) { - struct device *dev; - u32 pciexbar_reg; - *base = 0; + *len = 0; - dev = pcidev_on_root(0, 0); + struct device *dev = pcidev_on_root(0, 0); if (!dev) return 0; - pciexbar_reg = pci_read_config32(dev, PCIEXBAR); + const u32 pciexbar_reg = pci_read_config32(dev, PCIEXBAR); /* MMCFG not supported or not enabled */ if (!(pciexbar_reg & (1 << 0))) @@ -58,14 +57,17 @@ static int get_pcie_bar(u32 *base) switch ((pciexbar_reg >> 1) & 3) { case 0: /* 256MB */ - *base = pciexbar_reg & (0xffffffffULL << 28); - return 256; + *base = pciexbar_reg & (0x0f << 28); + *len = 256 * MiB; + return 1; case 1: /* 128M */ - *base = pciexbar_reg & (0xffffffffULL << 27); - return 128; + *base = pciexbar_reg & (0x1f << 27); + *len = 128 * MiB; + return 1; case 2: /* 64M */ - *base = pciexbar_reg & (0xffffffffULL << 26); - return 64; + *base = pciexbar_reg & (0x3f << 26); + *len = 64 * MiB; + return 1; } return 0; @@ -129,8 +131,7 @@ static void add_fixed_resources(struct device *dev, int index) static void mc_read_resources(struct device *dev) { - u32 pcie_config_base; - int buses; + u32 pcie_config_base, pcie_config_len; uint64_t tom, me_base, touud; uint32_t tseg_base, uma_size, tolud; uint16_t ggc; @@ -139,8 +140,8 @@ static void mc_read_resources(struct device *dev) pci_dev_read_resources(dev); - buses = get_pcie_bar(&pcie_config_base); - if (buses) { + if (decode_pcie_bar(&pcie_config_base, &pcie_config_len)) { + const int buses = pcie_config_len / MiB; struct resource *resource = new_resource(dev, PCIEXBAR); mmconf_resource_init(resource, pcie_config_base, buses); } |