Angel Pons | 8a3453f | 2020-04-02 23:48:19 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
efdesign98 | 4b50834 | 2011-07-13 17:16:13 -0700 | [diff] [blame] | 2 | |
efdesign98 | 7c0c64e | 2011-06-20 19:56:06 -0700 | [diff] [blame] | 3 | /****************************************************************************** |
4 | * AMD Generic Encapsulated Software Architecture | ||||
5 | * | ||||
Kyösti Mälkki | 7076aa5 | 2017-09-02 16:20:15 +0300 | [diff] [blame] | 6 | * $Workfile:: cache_as_ram.S |
efdesign98 | 7c0c64e | 2011-06-20 19:56:06 -0700 | [diff] [blame] | 7 | * |
Kyösti Mälkki | 7076aa5 | 2017-09-02 16:20:15 +0300 | [diff] [blame] | 8 | * Description: cache_as_ram.S - AGESA Module Entry Point for GCC complier |
efdesign98 | 7c0c64e | 2011-06-20 19:56:06 -0700 | [diff] [blame] | 9 | * |
10 | ****************************************************************************** | ||||
efdesign98 | 4b50834 | 2011-07-13 17:16:13 -0700 | [diff] [blame] | 11 | */ |
12 | |||||
Michał Żygowski | 3aa17f7 | 2019-11-24 16:32:05 +0100 | [diff] [blame] | 13 | #include <cpu/x86/lapic_def.h> |
Kyösti Mälkki | 7076aa5 | 2017-09-02 16:20:15 +0300 | [diff] [blame] | 14 | #include <cpu/x86/post_code.h> |
efdesign98 | 7c0c64e | 2011-06-20 19:56:06 -0700 | [diff] [blame] | 15 | |
Kyösti Mälkki | 7522a8f | 2020-11-20 16:47:38 +0200 | [diff] [blame] | 16 | .section .init |
17 | |||||
efdesign98 | 7c0c64e | 2011-06-20 19:56:06 -0700 | [diff] [blame] | 18 | .code32 |
Kyösti Mälkki | 7522a8f | 2020-11-20 16:47:38 +0200 | [diff] [blame] | 19 | |
Michał Żygowski | 1b12b64 | 2019-11-24 16:32:05 +0100 | [diff] [blame] | 20 | .global bootblock_pre_c_entry |
efdesign98 | 7c0c64e | 2011-06-20 19:56:06 -0700 | [diff] [blame] | 21 | |
Kyösti Mälkki | 7076aa5 | 2017-09-02 16:20:15 +0300 | [diff] [blame] | 22 | _cache_as_ram_setup: |
efdesign98 | 4b50834 | 2011-07-13 17:16:13 -0700 | [diff] [blame] | 23 | |
Kyösti Mälkki | 7522a8f | 2020-11-20 16:47:38 +0200 | [diff] [blame] | 24 | #include "gcccar.inc" |
25 | |||||
Michał Żygowski | 1b12b64 | 2019-11-24 16:32:05 +0100 | [diff] [blame] | 26 | /* |
27 | * on entry: | ||||
28 | * mm0: BIST (ignored) | ||||
29 | * mm2_mm1: timestamp at bootblock_protected_mode_entry | ||||
30 | */ | ||||
31 | bootblock_pre_c_entry: | ||||
32 | |||||
Elyes HAOUAS | dea45c1 | 2018-12-27 09:14:07 +0100 | [diff] [blame] | 33 | post_code(0xa0) |
efdesign98 | 4b50834 | 2011-07-13 17:16:13 -0700 | [diff] [blame] | 34 | |
Elyes HAOUAS | dea45c1 | 2018-12-27 09:14:07 +0100 | [diff] [blame] | 35 | AMD_ENABLE_STACK |
Kyösti Mälkki | f6fe2f1 | 2016-11-21 11:26:48 +0200 | [diff] [blame] | 36 | |
Michał Żygowski | 3aa17f7 | 2019-11-24 16:32:05 +0100 | [diff] [blame] | 37 | /* |
38 | * Set up bootblock stack on BSP. | ||||
39 | * AMD_ENABLE_STACK macro sets up a stack for BSP at BSP_STACK_BASE_ADDR | ||||
40 | * which is 0x30000 (_car_region_end), but for C bootblock the stack | ||||
41 | * begins at _ecar_stack (see arch/x86/car.ld) | ||||
42 | */ | ||||
43 | mov $LAPIC_BASE_MSR, %ecx | ||||
44 | rdmsr | ||||
45 | test $LAPIC_BASE_MSR_BOOTSTRAP_PROCESSOR, %eax | ||||
46 | jz ap_entry | ||||
47 | |||||
48 | mov $_ecar_stack, %esp | ||||
49 | |||||
Kyösti Mälkki | 33d0fb8 | 2019-11-29 06:38:46 +0200 | [diff] [blame] | 50 | /* Align the stack and keep aligned for call to bootblock_c_entry() */ |
51 | and $0xfffffff0, %esp | ||||
52 | sub $8, %esp | ||||
Kyösti Mälkki | 26929bd | 2016-11-23 20:40:53 +0200 | [diff] [blame] | 53 | |
Michał Żygowski | 1b12b64 | 2019-11-24 16:32:05 +0100 | [diff] [blame] | 54 | movd %mm2, %eax |
55 | pushl %eax /* tsc[63:32] */ | ||||
56 | movd %mm1, %eax | ||||
57 | pushl %eax /* tsc[31:0] */ | ||||
Kyösti Mälkki | 33d0fb8 | 2019-11-29 06:38:46 +0200 | [diff] [blame] | 58 | |
59 | post_code(0xa2) | ||||
60 | |||||
61 | call bootblock_c_entry | ||||
Kyösti Mälkki | 63fac81 | 2017-09-02 16:41:43 +0300 | [diff] [blame] | 62 | |
Michał Żygowski | 3aa17f7 | 2019-11-24 16:32:05 +0100 | [diff] [blame] | 63 | /* Never reached. */ |
Kyösti Mälkki | 63fac81 | 2017-09-02 16:41:43 +0300 | [diff] [blame] | 64 | |
Kyösti Mälkki | ba22e15 | 2016-11-23 06:47:15 +0200 | [diff] [blame] | 65 | stop: |
Michał Żygowski | 3aa17f7 | 2019-11-24 16:32:05 +0100 | [diff] [blame] | 66 | post_code(POST_DEAD_CODE) |
Elyes HAOUAS | dea45c1 | 2018-12-27 09:14:07 +0100 | [diff] [blame] | 67 | hlt |
68 | jmp stop | ||||
Kyösti Mälkki | 63fac81 | 2017-09-02 16:41:43 +0300 | [diff] [blame] | 69 | |
Michał Żygowski | 3aa17f7 | 2019-11-24 16:32:05 +0100 | [diff] [blame] | 70 | ap_entry: |
Kyösti Mälkki | 33d0fb8 | 2019-11-29 06:38:46 +0200 | [diff] [blame] | 71 | /* Align the stack for call to ap_bootblock_c_entry() */ |
Michał Żygowski | 3aa17f7 | 2019-11-24 16:32:05 +0100 | [diff] [blame] | 72 | and $0xfffffff0, %esp |
Kyösti Mälkki | 33d0fb8 | 2019-11-29 06:38:46 +0200 | [diff] [blame] | 73 | call ap_bootblock_c_entry |
Michał Żygowski | 3aa17f7 | 2019-11-24 16:32:05 +0100 | [diff] [blame] | 74 | |
75 | /* Never reached. */ | ||||
76 | jmp stop | ||||
77 | |||||
Kyösti Mälkki | 7076aa5 | 2017-09-02 16:20:15 +0300 | [diff] [blame] | 78 | _cache_as_ram_setup_end: |