| Felix Held | 4667322 | 2020-04-04 02:37:04 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Felix Held | 4667322 | 2020-04-04 02:37:04 +0200 | [diff] [blame] | 2 | |
| Martin Roth | 8180427 | 2022-11-20 20:30:18 -0700 | [diff] [blame] | 3 | #include <amdblocks/post_codes.h> |
| Arthur Heymans | 3edf840 | 2021-07-05 21:18:50 +0200 | [diff] [blame^] | 4 | #include <cpu/x86/64bit/entry64.inc> |
| Felix Held | 4667322 | 2020-04-04 02:37:04 +0200 | [diff] [blame] | 5 | #include <cpu/x86/post_code.h> |
| 6 | |
| Kyösti Mälkki | 7522a8f | 2020-11-20 16:47:38 +0200 | [diff] [blame] | 7 | .section .init, "ax", @progbits |
| 8 | |
| Raul E Rangel | ec26428 | 2020-06-04 16:42:50 -0600 | [diff] [blame] | 9 | .global bootblock_resume_entry |
| 10 | bootblock_resume_entry: |
| Yuchen He | 1e67adb | 2023-07-25 21:28:36 +0200 | [diff] [blame] | 11 | post_code(POSTCODE_BOOTBLOCK_RESUME_ENTRY) |
| Raul E Rangel | ec26428 | 2020-06-04 16:42:50 -0600 | [diff] [blame] | 12 | |
| 13 | /* Get an early timestamp */ |
| 14 | rdtsc |
| 15 | movd %eax, %mm1 |
| 16 | movd %edx, %mm2 |
| 17 | |
| 18 | /* Fall through to bootblock_pre_c_entry */ |
| 19 | |
| Felix Held | 4667322 | 2020-04-04 02:37:04 +0200 | [diff] [blame] | 20 | /* |
| 21 | * on entry: |
| 22 | * mm0: BIST (ignored) |
| Kyösti Mälkki | 6c7441f | 2020-12-05 08:39:57 +0200 | [diff] [blame] | 23 | * mm2_mm1: timestamp |
| Felix Held | 4667322 | 2020-04-04 02:37:04 +0200 | [diff] [blame] | 24 | */ |
| 25 | |
| 26 | .global bootblock_pre_c_entry |
| 27 | bootblock_pre_c_entry: |
| Yuchen He | 1e67adb | 2023-07-25 21:28:36 +0200 | [diff] [blame] | 28 | post_code(POSTCODE_BOOTBLOCK_PRE_C_ENTRY) |
| Felix Held | 4667322 | 2020-04-04 02:37:04 +0200 | [diff] [blame] | 29 | |
| Arthur Heymans | df09680 | 2022-04-19 21:46:20 +0200 | [diff] [blame] | 30 | #if ENV_X86_64 |
| Arthur Heymans | 3edf840 | 2021-07-05 21:18:50 +0200 | [diff] [blame^] | 31 | setup_longmode $(CONFIG_ARCH_X86_64_PGTBL_LOC) |
| Arthur Heymans | df09680 | 2022-04-19 21:46:20 +0200 | [diff] [blame] | 32 | #endif |
| 33 | |
| Raul E Rangel | 6f1d35e | 2020-06-17 11:10:58 -0600 | [diff] [blame] | 34 | /* Clear .bss section */ |
| 35 | cld |
| 36 | xor %eax, %eax |
| 37 | movl $(_ebss), %ecx |
| 38 | movl $(_bss), %edi |
| 39 | sub %edi, %ecx |
| 40 | shrl $2, %ecx |
| 41 | rep stosl |
| 42 | |
| Felix Held | 4667322 | 2020-04-04 02:37:04 +0200 | [diff] [blame] | 43 | movl $_eearlyram_stack, %esp |
| 44 | |
| 45 | /* Align the stack and keep aligned for call to bootblock_c_entry() */ |
| 46 | and $0xfffffff0, %esp |
| 47 | sub $8, %esp |
| 48 | |
| Arthur Heymans | df09680 | 2022-04-19 21:46:20 +0200 | [diff] [blame] | 49 | #if ENV_X86_64 |
| 50 | movd %mm2, %rdi |
| 51 | shlq $32, %rdi |
| 52 | movd %mm1, %rsi |
| 53 | or %rsi, %rdi |
| 54 | #else |
| Felix Held | 4667322 | 2020-04-04 02:37:04 +0200 | [diff] [blame] | 55 | movd %mm2, %eax |
| 56 | pushl %eax /* tsc[63:32] */ |
| 57 | movd %mm1, %eax |
| 58 | pushl %eax /* tsc[31:0] */ |
| Arthur Heymans | df09680 | 2022-04-19 21:46:20 +0200 | [diff] [blame] | 59 | #endif |
| Felix Held | 4667322 | 2020-04-04 02:37:04 +0200 | [diff] [blame] | 60 | |
| Yuchen He | 1e67adb | 2023-07-25 21:28:36 +0200 | [diff] [blame] | 61 | post_code(POSTCODE_BOOTBLOCK_PRE_C_DONE) |
| Felix Held | 4667322 | 2020-04-04 02:37:04 +0200 | [diff] [blame] | 62 | |
| 63 | call bootblock_c_entry |
| 64 | /* Never reached */ |
| 65 | |
| 66 | .halt_forever: |
| lilacious | 40cb3fe | 2023-06-21 23:24:14 +0200 | [diff] [blame] | 67 | post_code(POSTCODE_DEAD_CODE) |
| Felix Held | 4667322 | 2020-04-04 02:37:04 +0200 | [diff] [blame] | 68 | hlt |
| 69 | jmp .halt_forever |