diff options
Diffstat (limited to 'src/soc/amd/cezanne/root_complex.c')
| -rw-r--r-- | src/soc/amd/cezanne/root_complex.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/src/soc/amd/cezanne/root_complex.c b/src/soc/amd/cezanne/root_complex.c new file mode 100644 index 0000000000..fbbf86b642 --- /dev/null +++ b/src/soc/amd/cezanne/root_complex.c @@ -0,0 +1,143 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <amdblocks/memmap.h> +#include <cbmem.h> +#include <console/console.h> +#include <cpu/amd/msr.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <fsp/util.h> +#include <stdint.h> + +/* + * + * +--------------------------------+ + * | | + * | | + * | | + * | | + * | | + * | | + * | | + * reserved_dram_end +--------------------------------+ + * | | + * | verstage (if reqd) | + * | (VERSTAGE_SIZE) | + * +--------------------------------+ VERSTAGE_ADDR + * | | + * | FSP-M | + * | (FSP_M_SIZE) | + * +--------------------------------+ FSP_M_ADDR + * | romstage | + * | (ROMSTAGE_SIZE) | + * +--------------------------------+ ROMSTAGE_ADDR = BOOTBLOCK_END + * | | X86_RESET_VECTOR = BOOTBLOCK_END - 0x10 + * | bootblock | + * | (C_ENV_BOOTBLOCK_SIZE) | + * +--------------------------------+ BOOTBLOCK_ADDR = BOOTBLOCK_END - C_ENV_BOOTBLOCK_SIZE + * | Unused hole | + * | (86KiB) | + * +--------------------------------+ + * | FMAP cache (FMAP_SIZE) | + * +--------------------------------+ PSP_SHAREDMEM_BASE + PSP_SHAREDMEM_SIZE + PRERAM_CBMEM_CONSOLE_SIZE + 0x200 + * | Early Timestamp region (512B) | + * +--------------------------------+ PSP_SHAREDMEM_BASE + PSP_SHAREDMEM_SIZE + PRERAM_CBMEM_CONSOLE_SIZE + * | Preram CBMEM console | + * | (PRERAM_CBMEM_CONSOLE_SIZE) | + * +--------------------------------+ PSP_SHAREDMEM_BASE + PSP_SHAREDMEM_SIZE + * | PSP shared (vboot workbuf) | + * | (PSP_SHAREDMEM_SIZE) | + * +--------------------------------+ PSP_SHAREDMEM_BASE + * | APOB (64KiB) | + * +--------------------------------+ PSP_APOB_DRAM_ADDRESS + * | Early BSP stack | + * | (EARLYRAM_BSP_STACK_SIZE) | + * reserved_dram_start +--------------------------------+ EARLY_RESERVED_DRAM_BASE + * | DRAM | + * +--------------------------------+ 0x100000 + * | Option ROM | + * +--------------------------------+ 0xc0000 + * | Legacy VGA | + * +--------------------------------+ 0xa0000 + * | DRAM | + * +--------------------------------+ 0x0 + */ +static void read_resources(struct device *dev) +{ + uint32_t mem_usable = (uintptr_t)cbmem_top(); + unsigned int idx = 0; + const struct hob_header *hob = fsp_get_hob_list(); + const struct hob_resource *res; + + uintptr_t early_reserved_dram_start, early_reserved_dram_end; + const struct memmap_early_dram *e = memmap_get_early_dram_usage(); + + early_reserved_dram_start = e->base; + early_reserved_dram_end = e->base + e->size; + + /* 0x0 - 0x9ffff */ + ram_resource(dev, idx++, 0, 0xa0000 / KiB); + + /* 0xa0000 - 0xbffff: legacy VGA */ + mmio_resource(dev, idx++, 0xa0000 / KiB, 0x20000 / KiB); + + /* 0xc0000 - 0xfffff: Option ROM */ + reserved_ram_resource(dev, idx++, 0xc0000 / KiB, 0x40000 / KiB); + + /* 1MiB - bottom of DRAM reserved for early coreboot usage */ + ram_resource(dev, idx++, (1 * MiB) / KiB, + (early_reserved_dram_start - (1 * MiB)) / KiB); + + /* DRAM reserved for early coreboot usage */ + reserved_ram_resource(dev, idx++, early_reserved_dram_start / KiB, + (early_reserved_dram_end - early_reserved_dram_start) / KiB); + + /* + * top of DRAM consumed early - low top usable RAM + * cbmem_top() accounts for low UMA and TSEG if they are used. + */ + ram_resource(dev, idx++, early_reserved_dram_end / KiB, + (mem_usable - early_reserved_dram_end) / KiB); + + mmconf_resource(dev, MMIO_CONF_BASE); + + if (!hob) { + printk(BIOS_ERR, "Error: %s incomplete because no HOB list was found\n", + __func__); + return; + } + + for (; hob->type != HOB_TYPE_END_OF_HOB_LIST; hob = fsp_next_hob(hob)) { + + if (hob->type != HOB_TYPE_RESOURCE_DESCRIPTOR) + continue; + + res = fsp_hob_header_to_resource(hob); + + if (res->type == EFI_RESOURCE_SYSTEM_MEMORY && res->addr < mem_usable) + continue; /* 0 through low usable was set above */ + if (res->type == EFI_RESOURCE_MEMORY_MAPPED_IO) + continue; /* Done separately */ + + if (res->type == EFI_RESOURCE_SYSTEM_MEMORY) + ram_resource(dev, idx++, res->addr / KiB, res->length / KiB); + else if (res->type == EFI_RESOURCE_MEMORY_RESERVED) + reserved_ram_resource(dev, idx++, res->addr / KiB, res->length / KiB); + else + printk(BIOS_ERR, "Error: failed to set resources for type %d\n", + res->type); + } +} + +static struct device_operations root_complex_operations = { + .read_resources = read_resources, + .set_resources = noop_set_resources, + .enable_resources = pci_dev_enable_resources, +}; + +static const struct pci_driver family17_root_complex __pci_driver = { + .ops = &root_complex_operations, + .vendor = PCI_VENDOR_ID_AMD, + .device = PCI_DEVICE_ID_AMD_17H_MODEL_606F_NB, +}; |