| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <console/console.h> |
| #include <bootmem.h> |
| #include <boot/tables.h> |
| #include <boot/coreboot_tables.h> |
| #include <arch/pirq_routing.h> |
| #include <arch/smp/mpspec.h> |
| #include <acpi/acpi.h> |
| #include <commonlib/helpers.h> |
| #include <string.h> |
| #include <cbmem.h> |
| #include <smbios.h> |
| |
| static unsigned long write_pirq_table(unsigned long rom_table_end) |
| { |
| unsigned long high_table_pointer; |
| |
| #define MAX_PIRQ_TABLE_SIZE (4 * 1024) |
| post_code(0x9a); |
| |
| /* This table must be between 0x0f0000 and 0x100000 */ |
| rom_table_end = write_pirq_routing_table(rom_table_end); |
| rom_table_end = ALIGN_UP(rom_table_end, 1024); |
| |
| /* And add a high table version for those payloads that |
| * want to live in the F segment |
| */ |
| high_table_pointer = (unsigned long)cbmem_add(CBMEM_ID_PIRQ, |
| MAX_PIRQ_TABLE_SIZE); |
| if (high_table_pointer) { |
| unsigned long new_high_table_pointer; |
| new_high_table_pointer = |
| write_pirq_routing_table(high_table_pointer); |
| // FIXME make pirq table code intelligent enough to know how |
| // much space it's going to need. |
| if (new_high_table_pointer > (high_table_pointer |
| + MAX_PIRQ_TABLE_SIZE)) |
| printk(BIOS_ERR, "ERROR: Increase PIRQ size.\n"); |
| printk(BIOS_DEBUG, "PIRQ table: %ld bytes.\n", |
| new_high_table_pointer - high_table_pointer); |
| } |
| |
| return rom_table_end; |
| } |
| |
| static unsigned long write_mptable(unsigned long rom_table_end) |
| { |
| unsigned long high_table_pointer; |
| |
| #define MAX_MP_TABLE_SIZE (4 * 1024) |
| post_code(0x9b); |
| |
| /* The smp table must be in 0-1K, 639K-640K, or 960K-1M */ |
| rom_table_end = write_smp_table(rom_table_end); |
| rom_table_end = ALIGN_UP(rom_table_end, 1024); |
| |
| high_table_pointer = (unsigned long)cbmem_add(CBMEM_ID_MPTABLE, |
| MAX_MP_TABLE_SIZE); |
| if (high_table_pointer) { |
| unsigned long new_high_table_pointer; |
| new_high_table_pointer = write_smp_table(high_table_pointer); |
| // FIXME make mp table code intelligent enough to know how |
| // much space it's going to need. |
| if (new_high_table_pointer > (high_table_pointer |
| + MAX_MP_TABLE_SIZE)) |
| printk(BIOS_ERR, "ERROR: Increase MP table size.\n"); |
| |
| printk(BIOS_DEBUG, "MP table: %ld bytes.\n", |
| new_high_table_pointer - high_table_pointer); |
| } |
| |
| return rom_table_end; |
| } |
| |
| static unsigned long write_acpi_table(unsigned long rom_table_end) |
| { |
| unsigned long high_table_pointer; |
| const size_t max_acpi_size = CONFIG_MAX_ACPI_TABLE_SIZE_KB * KiB; |
| |
| post_code(0x9c); |
| |
| /* Write ACPI tables to F segment and high tables area */ |
| |
| /* Ok, this is a bit hacky still, because some day we want to have this |
| * completely dynamic. But right now we are setting fixed sizes. |
| * It's probably still better than the old high_table_base code because |
| * now at least we know when we have an overflow in the area. |
| * |
| * We want to use 1MB - 64K for Resume backup. We use 512B for TOC and |
| * 512 byte for GDT, 4K for PIRQ and 4K for MP table and 8KB for the |
| * coreboot table. This leaves us with 47KB for all of ACPI. Let's see |
| * how far we get. |
| */ |
| high_table_pointer = (unsigned long)cbmem_add(CBMEM_ID_ACPI, |
| max_acpi_size); |
| if (high_table_pointer) { |
| unsigned long acpi_start = high_table_pointer; |
| unsigned long new_high_table_pointer; |
| |
| rom_table_end = ALIGN_UP(rom_table_end, 16); |
| new_high_table_pointer = write_acpi_tables(high_table_pointer); |
| if (new_high_table_pointer > (high_table_pointer |
| + max_acpi_size)) |
| printk(BIOS_ERR, "ERROR: Increase ACPI size\n"); |
| printk(BIOS_DEBUG, "ACPI tables: %ld bytes.\n", |
| new_high_table_pointer - high_table_pointer); |
| |
| /* Now we need to create a low table copy of the RSDP. */ |
| |
| /* First we look for the high table RSDP */ |
| while (acpi_start < new_high_table_pointer) { |
| if (memcmp(((acpi_rsdp_t *)acpi_start)->signature, |
| RSDP_SIG, 8) == 0) |
| break; |
| acpi_start++; |
| } |
| |
| /* Now, if we found the RSDP, we take the RSDT and XSDT pointer |
| * from it in order to write the low RSDP |
| */ |
| if (acpi_start < new_high_table_pointer) { |
| acpi_rsdp_t *low_rsdp = (acpi_rsdp_t *)rom_table_end, |
| *high_rsdp = (acpi_rsdp_t *)acpi_start; |
| |
| /* Technically rsdp length varies but coreboot always |
| writes longest size available. */ |
| memcpy(low_rsdp, high_rsdp, sizeof(acpi_rsdp_t)); |
| } else { |
| printk(BIOS_ERR, |
| "ERROR: Didn't find RSDP in high table.\n"); |
| } |
| rom_table_end = ALIGN_UP(rom_table_end + sizeof(acpi_rsdp_t), 16); |
| } else { |
| rom_table_end = write_acpi_tables(rom_table_end); |
| rom_table_end = ALIGN_UP(rom_table_end, 1024); |
| } |
| |
| return rom_table_end; |
| } |
| |
| static unsigned long write_smbios_table(unsigned long rom_table_end) |
| { |
| unsigned long high_table_pointer; |
| |
| #define MAX_SMBIOS_SIZE (4 * KiB) |
| |
| high_table_pointer = (unsigned long)cbmem_add(CBMEM_ID_SMBIOS, |
| MAX_SMBIOS_SIZE); |
| if (high_table_pointer) { |
| unsigned long new_high_table_pointer; |
| |
| new_high_table_pointer = |
| smbios_write_tables(high_table_pointer); |
| rom_table_end = ALIGN_UP(rom_table_end, 16); |
| memcpy((void *)rom_table_end, (void *)high_table_pointer, |
| sizeof(struct smbios_entry)); |
| rom_table_end += sizeof(struct smbios_entry); |
| |
| if (new_high_table_pointer > (high_table_pointer |
| + MAX_SMBIOS_SIZE)) |
| printk(BIOS_ERR, "ERROR: Increase SMBIOS size\n"); |
| printk(BIOS_DEBUG, "SMBIOS tables: %ld bytes.\n", |
| new_high_table_pointer - high_table_pointer); |
| } else { |
| unsigned long new_rom_table_end; |
| |
| new_rom_table_end = smbios_write_tables(rom_table_end); |
| printk(BIOS_DEBUG, "SMBIOS size %ld bytes\n", new_rom_table_end |
| - rom_table_end); |
| rom_table_end = ALIGN_UP(new_rom_table_end, 16); |
| } |
| |
| return rom_table_end; |
| } |
| |
| /* Start forwarding table at 0x500, so we don't run into conflicts with the BDA |
| * in case our data structures grow beyond 0x400. Only GDT |
| * and the coreboot table use low_tables. |
| */ |
| #define FORWARDING_TABLE_ADDR ((uintptr_t)0x500) |
| static uintptr_t forwarding_table = FORWARDING_TABLE_ADDR; |
| |
| void arch_write_tables(uintptr_t coreboot_table) |
| { |
| size_t sz; |
| unsigned long rom_table_end = 0xf0000; |
| |
| /* This table must be between 0x0f0000 and 0x100000 */ |
| if (CONFIG(GENERATE_PIRQ_TABLE)) |
| rom_table_end = write_pirq_table(rom_table_end); |
| |
| /* The smp table must be in 0-1K, 639K-640K, or 960K-1M */ |
| if (CONFIG(GENERATE_MP_TABLE)) |
| rom_table_end = write_mptable(rom_table_end); |
| |
| if (CONFIG(HAVE_ACPI_TABLES)) |
| rom_table_end = write_acpi_table(rom_table_end); |
| |
| if (CONFIG(GENERATE_SMBIOS_TABLES)) |
| rom_table_end = write_smbios_table(rom_table_end); |
| |
| sz = write_coreboot_forwarding_table(forwarding_table, coreboot_table); |
| |
| forwarding_table += sz; |
| /* Align up to page boundary for historical consistency. */ |
| forwarding_table = ALIGN_UP(forwarding_table, 4*KiB); |
| |
| /* Tell static analysis we know value is left unused. */ |
| (void)rom_table_end; |
| } |
| |
| void bootmem_arch_add_ranges(void) |
| { |
| /* Memory from 0 through the forwarding_table is reserved. */ |
| const uintptr_t base = 0; |
| |
| bootmem_add_range(base, forwarding_table - base, BM_MEM_TABLE); |
| } |