diff options
Diffstat (limited to 'arch/x86/lib/fsp')
| -rw-r--r-- | arch/x86/lib/fsp/Makefile | 10 | ||||
| -rw-r--r-- | arch/x86/lib/fsp/fsp_car.S | 124 | ||||
| -rw-r--r-- | arch/x86/lib/fsp/fsp_common.c | 55 | ||||
| -rw-r--r-- | arch/x86/lib/fsp/fsp_dram.c | 81 | ||||
| -rw-r--r-- | arch/x86/lib/fsp/fsp_support.c | 412 |
5 files changed, 682 insertions, 0 deletions
diff --git a/arch/x86/lib/fsp/Makefile b/arch/x86/lib/fsp/Makefile new file mode 100644 index 0000000000..5b12c12d7a --- /dev/null +++ b/arch/x86/lib/fsp/Makefile @@ -0,0 +1,10 @@ +# +# Copyright (C) 2015 Google, Inc +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-y += fsp_car.o +obj-y += fsp_common.o +obj-y += fsp_dram.o +obj-y += fsp_support.o diff --git a/arch/x86/lib/fsp/fsp_car.S b/arch/x86/lib/fsp/fsp_car.S new file mode 100644 index 0000000000..5e09568b85 --- /dev/null +++ b/arch/x86/lib/fsp/fsp_car.S @@ -0,0 +1,124 @@ +/* + * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <config.h> +#include <asm/post.h> + +.globl car_init +car_init: + /* + * Note: ebp holds the BIST value (built-in self test) so far, but ebp + * will be destroyed through the FSP call, thus we have to test the + * BIST value here before we call into FSP. + */ + test %ebp, %ebp + jz car_init_start + post_code(POST_BIST_FAILURE) + jmp die + +car_init_start: + post_code(POST_CAR_START) + lea find_fsp_header_romstack, %esp + jmp find_fsp_header + +find_fsp_header_ret: + /* EAX points to FSP_INFO_HEADER */ + mov %eax, %ebp + + /* sanity test */ + cmp $CONFIG_FSP_ADDR, %eax + jb die + + /* calculate TempRamInitEntry address */ + mov 0x30(%ebp), %eax + add 0x1c(%ebp), %eax + + /* call FSP TempRamInitEntry to setup temporary stack */ + lea temp_ram_init_romstack, %esp + jmp *%eax + +temp_ram_init_ret: + addl $4, %esp + cmp $0, %eax + jnz car_init_fail + + post_code(POST_CAR_CPU_CACHE) + + /* + * The FSP TempRamInit initializes the ecx and edx registers to + * point to a temporary but writable memory range (Cache-As-RAM). + * ecx: the start of this temporary memory range, + * edx: the end of this range. + */ + + /* stack grows down from top of CAR */ + movl %edx, %esp + + /* + * TODO: + * + * According to FSP architecture spec, the fsp_init() will not return + * to its caller, instead it requires the bootloader to provide a + * so-called continuation function to pass into the FSP as a parameter + * of fsp_init, and fsp_init() will call that continuation function + * directly. + * + * The call to fsp_init() may need to be moved out of the car_init() + * to cpu_init_f() with the help of some inline assembly codes. + * Note there is another issue that fsp_init() will setup another stack + * using the fsp_init parameter stack_top after DRAM is initialized, + * which means any data on the previous stack (on the CAR) gets lost + * (ie: U-Boot global_data). FSP is supposed to support such scenario, + * however it does not work. This should be revisited in the future. + */ + movl $CONFIG_FSP_TEMP_RAM_ADDR, %eax + xorl %edx, %edx + xorl %ecx, %ecx + call fsp_init + +.global fsp_init_done +fsp_init_done: + /* + * We come here from FspInit with eax pointing to the HOB list. + * Save eax to esi temporarily. + */ + movl %eax, %esi + /* + * Re-initialize the ebp (BIST) to zero, as we already reach here + * which means we passed BIST testing before. + */ + xorl %ebp, %ebp + jmp car_init_ret + +car_init_fail: + post_code(POST_CAR_FAILURE) + +die: + hlt + jmp die + hlt + + /* + * The function call before CAR initialization is tricky. It cannot + * be called using the 'call' instruction but only the 'jmp' with + * the help of a handcrafted stack in the ROM. The stack needs to + * contain the function return address as well as the parameters. + */ + .balign 4 +find_fsp_header_romstack: + .long find_fsp_header_ret + + .balign 4 +temp_ram_init_romstack: + .long temp_ram_init_ret + .long temp_ram_init_params +temp_ram_init_params: +_dt_ucode_base_size: + /* These next two fields are filled in by ifdtool */ + .long 0 /* microcode base */ + .long 0 /* microcode size */ + .long CONFIG_SYS_MONITOR_BASE /* code region base */ + .long CONFIG_SYS_MONITOR_LEN /* code region size */ diff --git a/arch/x86/lib/fsp/fsp_common.c b/arch/x86/lib/fsp/fsp_common.c new file mode 100644 index 0000000000..f668259c0e --- /dev/null +++ b/arch/x86/lib/fsp/fsp_common.c @@ -0,0 +1,55 @@ +/* + * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <errno.h> +#include <asm/io.h> +#include <asm/post.h> +#include <asm/processor.h> +#include <asm/fsp/fsp_support.h> + +int print_cpuinfo(void) +{ + post_code(POST_CPU_INFO); + return default_print_cpuinfo(); +} + +void reset_cpu(ulong addr) +{ + /* cold reset */ + outb(0x06, PORT_RESET); +} + + +int board_pci_post_scan(struct pci_controller *hose) +{ + u32 status; + + /* call into FspNotify */ + debug("Calling into FSP (notify phase INIT_PHASE_PCI): "); + status = fsp_notify(NULL, INIT_PHASE_PCI); + if (status != FSP_SUCCESS) + debug("fail, error code %x\n", status); + else + debug("OK\n"); + + return 0; +} + +void board_final_cleanup(void) +{ + u32 status; + + /* call into FspNotify */ + debug("Calling into FSP (notify phase INIT_PHASE_BOOT): "); + status = fsp_notify(NULL, INIT_PHASE_BOOT); + if (status != FSP_SUCCESS) + debug("fail, error code %x\n", status); + else + debug("OK\n"); + + return; +} diff --git a/arch/x86/lib/fsp/fsp_dram.c b/arch/x86/lib/fsp/fsp_dram.c new file mode 100644 index 0000000000..4c0a7c82ca --- /dev/null +++ b/arch/x86/lib/fsp/fsp_dram.c @@ -0,0 +1,81 @@ +/* + * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/fsp/fsp_support.h> +#include <asm/e820.h> +#include <asm/post.h> + +DECLARE_GLOBAL_DATA_PTR; + +int dram_init(void) +{ + phys_size_t ram_size = 0; + const struct hob_header *hdr; + struct hob_res_desc *res_desc; + + hdr = gd->arch.hob_list; + while (!end_of_hob(hdr)) { + if (hdr->type == HOB_TYPE_RES_DESC) { + res_desc = (struct hob_res_desc *)hdr; + if (res_desc->type == RES_SYS_MEM || + res_desc->type == RES_MEM_RESERVED) { + ram_size += res_desc->len; + } + } + hdr = get_next_hob(hdr); + } + + gd->ram_size = ram_size; + post_code(POST_DRAM); + + return 0; +} + +void dram_init_banksize(void) +{ + gd->bd->bi_dram[0].start = 0; + gd->bd->bi_dram[0].size = gd->ram_size; +} + +/* + * This function looks for the highest region of memory lower than 4GB which + * has enough space for U-Boot where U-Boot is aligned on a page boundary. + * It overrides the default implementation found elsewhere which simply + * picks the end of ram, wherever that may be. The location of the stack, + * the relocation address, and how far U-Boot is moved by relocation are + * set in the global data structure. + */ +ulong board_get_usable_ram_top(ulong total_size) +{ + return fsp_get_usable_lowmem_top(gd->arch.hob_list); +} + +unsigned install_e820_map(unsigned max_entries, struct e820entry *entries) +{ + unsigned num_entries = 0; + const struct hob_header *hdr; + struct hob_res_desc *res_desc; + + hdr = gd->arch.hob_list; + + while (!end_of_hob(hdr)) { + if (hdr->type == HOB_TYPE_RES_DESC) { + res_desc = (struct hob_res_desc *)hdr; + entries[num_entries].addr = res_desc->phys_start; + entries[num_entries].size = res_desc->len; + + if (res_desc->type == RES_SYS_MEM) + entries[num_entries].type = E820_RAM; + else if (res_desc->type == RES_MEM_RESERVED) + entries[num_entries].type = E820_RESERVED; + } + hdr = get_next_hob(hdr); + num_entries++; + } + + return num_entries; +} diff --git a/arch/x86/lib/fsp/fsp_support.c b/arch/x86/lib/fsp/fsp_support.c new file mode 100644 index 0000000000..5f96da120e --- /dev/null +++ b/arch/x86/lib/fsp/fsp_support.c @@ -0,0 +1,412 @@ +/* + * Copyright (C) 2013, Intel Corporation + * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com> + * + * SPDX-License-Identifier: Intel + */ + +#include <common.h> +#include <asm/fsp/fsp_support.h> +#include <asm/post.h> + +/** + * Compares two GUIDs + * + * If the GUIDs are identical then true is returned. + * If there are any bit differences in the two GUIDs, then false is returned. + * + * @guid1: A pointer to a 128 bit GUID. + * @guid2: A pointer to a 128 bit GUID. + * + * @retval true: guid1 and guid2 are identical. + * @retval false: guid1 and guid2 are not identical. + */ +static bool compare_guid(const struct efi_guid *guid1, + const struct efi_guid *guid2) +{ + if (memcmp(guid1, guid2, sizeof(struct efi_guid)) == 0) + return true; + else + return false; +} + +struct fsp_header *__attribute__((optimize("O0"))) find_fsp_header(void) +{ + /* + * This function may be called before the a stack is established, + * so special care must be taken. First, it cannot declare any local + * variable using stack. Only register variable can be used here. + * Secondly, some compiler version will add prolog or epilog code + * for the C function. If so the function call may not work before + * stack is ready. + * + * GCC 4.8.1 has been verified to be working for the following codes. + */ + volatile register u8 *fsp asm("eax"); + + /* Initalize the FSP base */ + fsp = (u8 *)CONFIG_FSP_ADDR; + + /* Check the FV signature, _FVH */ + if (((struct fv_header *)fsp)->sign == EFI_FVH_SIGNATURE) { + /* Go to the end of the FV header and align the address */ + fsp += ((struct fv_header *)fsp)->ext_hdr_off; + fsp += ((struct fv_ext_header *)fsp)->ext_hdr_size; + fsp = (u8 *)(((u32)fsp + 7) & 0xFFFFFFF8); + } else { + fsp = 0; + } + + /* Check the FFS GUID */ + if (fsp && + ((struct ffs_file_header *)fsp)->name.data1 == FSP_GUID_DATA1 && + ((struct ffs_file_header *)fsp)->name.data2 == FSP_GUID_DATA2 && + ((struct ffs_file_header *)fsp)->name.data3 == FSP_GUID_DATA3 && + ((struct ffs_file_header *)fsp)->name.data4[0] == FSP_GUID_DATA4_0 && + ((struct ffs_file_header *)fsp)->name.data4[1] == FSP_GUID_DATA4_1 && + ((struct ffs_file_header *)fsp)->name.data4[2] == FSP_GUID_DATA4_2 && + ((struct ffs_file_header *)fsp)->name.data4[3] == FSP_GUID_DATA4_3 && + ((struct ffs_file_header *)fsp)->name.data4[4] == FSP_GUID_DATA4_4 && + ((struct ffs_file_header *)fsp)->name.data4[5] == FSP_GUID_DATA4_5 && + ((struct ffs_file_header *)fsp)->name.data4[6] == FSP_GUID_DATA4_6 && + ((struct ffs_file_header *)fsp)->name.data4[7] == FSP_GUID_DATA4_7) { + /* Add the FFS header size to find the raw section header */ + fsp += sizeof(struct ffs_file_header); + } else { + fsp = 0; + } + + if (fsp && + ((struct raw_section *)fsp)->type == EFI_SECTION_RAW) { + /* Add the raw section header size to find the FSP header */ + fsp += sizeof(struct raw_section); + } else { + fsp = 0; + } + + return (struct fsp_header *)fsp; +} + +void fsp_continue(struct shared_data *shared_data, u32 status, void *hob_list) +{ + u32 stack_len; + u32 stack_base; + u32 stack_top; + + post_code(POST_MRC); + + assert(status == 0); + + /* Get the migrated stack in normal memory */ + stack_base = (u32)fsp_get_bootloader_tmp_mem(hob_list, &stack_len); + assert(stack_base != 0); + stack_top = stack_base + stack_len - sizeof(u32); + + /* + * Old stack base is stored at the very end of the stack top, + * use it to calculate the migrated shared data base + */ + shared_data = (struct shared_data *)(stack_base + + ((u32)shared_data - *(u32 *)stack_top)); + + /* The boot loader main function entry */ + fsp_init_done(hob_list); +} + +void fsp_init(u32 stack_top, u32 boot_mode, void *nvs_buf) +{ + struct shared_data shared_data; + fsp_init_f init; + struct fsp_init_params params; + struct fspinit_rtbuf rt_buf; + struct vpd_region *fsp_vpd; + struct fsp_header *fsp_hdr; + struct fsp_init_params *params_ptr; + struct upd_region *fsp_upd; + +#ifdef CONFIG_DEBUG_UART + setup_early_uart(); +#endif + + fsp_hdr = find_fsp_header(); + if (fsp_hdr == NULL) { + /* No valid FSP info header was found */ + panic("Invalid FSP header"); + } + + fsp_upd = &shared_data.fsp_upd; + memset(&rt_buf, 0, sizeof(struct fspinit_rtbuf)); + + /* Reserve a gap in stack top */ + rt_buf.common.stack_top = (u32 *)stack_top - 32; + rt_buf.common.boot_mode = boot_mode; + rt_buf.common.upd_data = fsp_upd; + + /* Get VPD region start */ + fsp_vpd = (struct vpd_region *)(fsp_hdr->img_base + + fsp_hdr->cfg_region_off); + + /* Verify the VPD data region is valid */ + assert((fsp_vpd->img_rev == VPD_IMAGE_REV) && + (fsp_vpd->sign == VPD_IMAGE_ID)); + + /* Copy default data from Flash */ + memcpy(fsp_upd, (void *)(fsp_hdr->img_base + fsp_vpd->upd_offset), + sizeof(struct upd_region)); + + /* Verify the UPD data region is valid */ + assert(fsp_upd->terminator == UPD_TERMINATOR); + + /* Override any UPD setting if required */ + update_fsp_upd(fsp_upd); + + memset(¶ms, 0, sizeof(struct fsp_init_params)); + params.nvs_buf = nvs_buf; + params.rt_buf = (struct fspinit_rtbuf *)&rt_buf; + params.continuation = (fsp_continuation_f)asm_continuation; + + init = (fsp_init_f)(fsp_hdr->img_base + fsp_hdr->fsp_init); + params_ptr = ¶ms; + + shared_data.fsp_hdr = fsp_hdr; + shared_data.stack_top = (u32 *)stack_top; + + post_code(POST_PRE_MRC); + + /* + * Use ASM code to ensure the register value in EAX & ECX + * will be passed into BlContinuationFunc + */ + asm volatile ( + "pushl %0;" + "call *%%eax;" + ".global asm_continuation;" + "asm_continuation:;" + "movl %%ebx, %%eax;" /* shared_data */ + "movl 4(%%esp), %%edx;" /* status */ + "movl 8(%%esp), %%ecx;" /* hob_list */ + "jmp fsp_continue;" + : : "m"(params_ptr), "a"(init), "b"(&shared_data) + ); + + /* + * Should never get here. + * Control will continue from fsp_continue. + * This line below is to prevent the compiler from optimizing + * structure intialization. + * + * DO NOT REMOVE! + */ + init(¶ms); +} + +u32 fsp_notify(struct fsp_header *fsp_hdr, u32 phase) +{ + fsp_notify_f notify; + struct fsp_notify_params params; + struct fsp_notify_params *params_ptr; + u32 status; + + if (!fsp_hdr) + fsp_hdr = (struct fsp_header *)find_fsp_header(); + + if (fsp_hdr == NULL) { + /* No valid FSP info header */ + panic("Invalid FSP header"); + } + + notify = (fsp_notify_f)(fsp_hdr->img_base + fsp_hdr->fsp_notify); + params.phase = phase; + params_ptr = ¶ms; + + /* + * Use ASM code to ensure correct parameter is on the stack for + * FspNotify as U-Boot is using different ABI from FSP + */ + asm volatile ( + "pushl %1;" /* push notify phase */ + "call *%%eax;" /* call FspNotify */ + "addl $4, %%esp;" /* clean up the stack */ + : "=a"(status) : "m"(params_ptr), "a"(notify), "m"(*params_ptr) + ); + + return status; +} + +u32 fsp_get_usable_lowmem_top(const void *hob_list) +{ + const struct hob_header *hdr; + struct hob_res_desc *res_desc; + phys_addr_t phys_start; + u32 top; + + /* Get the HOB list for processing */ + hdr = hob_list; + + /* * Collect memory ranges */ + top = FSP_LOWMEM_BASE; + while (!end_of_hob(hdr)) { + if (hdr->type == HOB_TYPE_RES_DESC) { + res_desc = (struct hob_res_desc *)hdr; + if (res_desc->type == RES_SYS_MEM) { + phys_start = res_desc->phys_start; + /* Need memory above 1MB to be collected here */ + if (phys_start >= FSP_LOWMEM_BASE && + phys_start < (phys_addr_t)FSP_HIGHMEM_BASE) + top += (u32)(res_desc->len); + } + } + hdr = get_next_hob(hdr); + } + + return top; +} + +u64 fsp_get_usable_highmem_top(const void *hob_list) +{ + const struct hob_header *hdr; + struct hob_res_desc *res_desc; + phys_addr_t phys_start; + u64 top; + + /* Get the HOB list for processing */ + hdr = hob_list; + + /* Collect memory ranges */ + top = FSP_HIGHMEM_BASE; + while (!end_of_hob(hdr)) { + if (hdr->type == HOB_TYPE_RES_DESC) { + res_desc = (struct hob_res_desc *)hdr; + if (res_desc->type == RES_SYS_MEM) { + phys_start = res_desc->phys_start; + /* Need memory above 1MB to be collected here */ + if (phys_start >= (phys_addr_t)FSP_HIGHMEM_BASE) + top += (u32)(res_desc->len); + } + } + hdr = get_next_hob(hdr); + } + + return top; +} + +u64 fsp_get_reserved_mem_from_guid(const void *hob_list, u64 *len, + struct efi_guid *guid) +{ + const struct hob_header *hdr; + struct hob_res_desc *res_desc; + + /* Get the HOB list for processing */ + hdr = hob_list; + + /* Collect memory ranges */ + while (!end_of_hob(hdr)) { + if (hdr->type == HOB_TYPE_RES_DESC) { + res_desc = (struct hob_res_desc *)hdr; + if (res_desc->type == RES_MEM_RESERVED) { + if (compare_guid(&res_desc->owner, guid)) { + if (len) + *len = (u32)(res_desc->len); + + return (u64)(res_desc->phys_start); + } + } + } + hdr = get_next_hob(hdr); + } + + return 0; +} + +u32 fsp_get_fsp_reserved_mem(const void *hob_list, u32 *len) +{ + const struct efi_guid guid = FSP_HOB_RESOURCE_OWNER_FSP_GUID; + u64 length; + u32 base; + + base = (u32)fsp_get_reserved_mem_from_guid(hob_list, + &length, (struct efi_guid *)&guid); + if ((len != 0) && (base != 0)) + *len = (u32)length; + + return base; +} + +u32 fsp_get_tseg_reserved_mem(const void *hob_list, u32 *len) +{ + const struct efi_guid guid = FSP_HOB_RESOURCE_OWNER_TSEG_GUID; + u64 length; + u32 base; + + base = (u32)fsp_get_reserved_mem_from_guid(hob_list, + &length, (struct efi_guid *)&guid); + if ((len != 0) && (base != 0)) + *len = (u32)length; + + return base; +} + +const struct hob_header *fsp_get_next_hob(uint type, const void *hob_list) +{ + const struct hob_header *hdr; + + hdr = hob_list; + + /* Parse the HOB list until end of list or matching type is found */ + while (!end_of_hob(hdr)) { + if (hdr->type == type) + return hdr; + + hdr = get_next_hob(hdr); + } + + return NULL; +} + +const struct hob_header *fsp_get_next_guid_hob(const struct efi_guid *guid, + const void *hob_list) +{ + const struct hob_header *hdr; + struct hob_guid *guid_hob; + + hdr = hob_list; + while ((hdr = fsp_get_next_hob(HOB_TYPE_GUID_EXT, + hdr)) != NULL) { + guid_hob = (struct hob_guid *)hdr; + if (compare_guid(guid, &(guid_hob->name))) + break; + hdr = get_next_hob(hdr); + } + + return hdr; +} + +void *fsp_get_guid_hob_data(const void *hob_list, u32 *len, + struct efi_guid *guid) +{ + const struct hob_header *guid_hob; + + guid_hob = fsp_get_next_guid_hob(guid, hob_list); + if (guid_hob == NULL) { + return NULL; + } else { + if (len) + *len = get_guid_hob_data_size(guid_hob); + + return get_guid_hob_data(guid_hob); + } +} + +void *fsp_get_nvs_data(const void *hob_list, u32 *len) +{ + const struct efi_guid guid = FSP_NON_VOLATILE_STORAGE_HOB_GUID; + + return fsp_get_guid_hob_data(hob_list, len, (struct efi_guid *)&guid); +} + +void *fsp_get_bootloader_tmp_mem(const void *hob_list, u32 *len) +{ + const struct efi_guid guid = FSP_BOOTLOADER_TEMP_MEM_HOB_GUID; + + return fsp_get_guid_hob_data(hob_list, len, (struct efi_guid *)&guid); +} |