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review.coreboot.org / coreboot / 40cb3fe94dacfba0b146aae2be9c03c0a0ddb691 / . / src / drivers / amd / agesa / cache_as_ram.S
blob: 9fd1a0aba27a3e683407d7536dc4b1e98f187a38 [file] [log] [blame]
Angel Pons8a3453f2020-04-02 23:48:19 +0200[diff] [blame]1/* SPDX-License-Identifier: GPL-2.0-only */
efdesign984b508342011-07-13 17:16:13 -0700[diff] [blame]2
efdesign987c0c64e2011-06-20 19:56:06 -0700[diff] [blame]3/******************************************************************************
4 * AMD Generic Encapsulated Software Architecture
5 *
Kyösti Mälkki7076aa52017-09-02 16:20:15 +0300[diff] [blame]6 * $Workfile:: cache_as_ram.S
efdesign987c0c64e2011-06-20 19:56:06 -0700[diff] [blame]7 *
Martin Roth0949e732021-10-01 14:28:22 -0600[diff] [blame]8 * Description: cache_as_ram.S - AGESA Module Entry Point for GCC compiler
efdesign987c0c64e2011-06-20 19:56:06 -0700[diff] [blame]9 *
10 ******************************************************************************
efdesign984b508342011-07-13 17:16:13 -0700[diff] [blame]11 */
12
Michał Żygowski3aa17f72019-11-24 16:32:05 +0100[diff] [blame]13#include <cpu/x86/lapic_def.h>
Kyösti Mälkki7076aa52017-09-02 16:20:15 +0300[diff] [blame]14#include <cpu/x86/post_code.h>
Martin Rothbf3f94d2022-12-31 16:31:01 -0700[diff] [blame]15#include <amdblocks/post_codes.h>
efdesign987c0c64e2011-06-20 19:56:06 -0700[diff] [blame]16
Kyösti Mälkki7522a8f2020-11-20 16:47:38 +0200[diff] [blame]17.section .init
18
efdesign987c0c64e2011-06-20 19:56:06 -0700[diff] [blame]19.code32
Kyösti Mälkki7522a8f2020-11-20 16:47:38 +0200[diff] [blame]20
Michał Żygowski1b12b642019-11-24 16:32:05 +0100[diff] [blame]21.global bootblock_pre_c_entry
efdesign987c0c64e2011-06-20 19:56:06 -0700[diff] [blame]22
Kyösti Mälkki7076aa52017-09-02 16:20:15 +0300[diff] [blame]23_cache_as_ram_setup:
efdesign984b508342011-07-13 17:16:13 -0700[diff] [blame]24
Kyösti Mälkki7522a8f2020-11-20 16:47:38 +0200[diff] [blame]25#include "gcccar.inc"
26
Michał Żygowski1b12b642019-11-24 16:32:05 +0100[diff] [blame]27/*
28 * on entry:
29 * mm0: BIST (ignored)
Kyösti Mälkki6c7441f2020-12-05 08:39:57 +0200[diff] [blame]30 * mm2_mm1: timestamp
Michał Żygowski1b12b642019-11-24 16:32:05 +0100[diff] [blame]31 */
32bootblock_pre_c_entry:
33
Martin Rothbf3f94d2022-12-31 16:31:01 -0700[diff] [blame]34 post_code(POST_BOOTBLOCK_PRE_C_ENTRY)
efdesign984b508342011-07-13 17:16:13 -0700[diff] [blame]35
Elyes HAOUASdea45c12018-12-27 09:14:07 +0100[diff] [blame]36 AMD_ENABLE_STACK
Kyösti Mälkkif6fe2f12016-11-21 11:26:48 +0200[diff] [blame]37
Michał Żygowski3aa17f72019-11-24 16:32:05 +0100[diff] [blame]38 /*
39 * Set up bootblock stack on BSP.
40 * AMD_ENABLE_STACK macro sets up a stack for BSP at BSP_STACK_BASE_ADDR
41 * which is 0x30000 (_car_region_end), but for C bootblock the stack
42 * begins at _ecar_stack (see arch/x86/car.ld)
43 */
44 mov $LAPIC_BASE_MSR, %ecx
45 rdmsr
46 test $LAPIC_BASE_MSR_BOOTSTRAP_PROCESSOR, %eax
47 jz ap_entry
48
49 mov $_ecar_stack, %esp
50
Kyösti Mälkki33d0fb82019-11-29 06:38:46 +0200[diff] [blame]51 /* Align the stack and keep aligned for call to bootblock_c_entry() */
52 and $0xfffffff0, %esp
53 sub $8, %esp
Kyösti Mälkki26929bd2016-11-23 20:40:53 +0200[diff] [blame]54
Michał Żygowski1b12b642019-11-24 16:32:05 +0100[diff] [blame]55 movd %mm2, %eax
56 pushl %eax /* tsc[63:32] */
57 movd %mm1, %eax
58 pushl %eax /* tsc[31:0] */
Kyösti Mälkki33d0fb82019-11-29 06:38:46 +0200[diff] [blame]59
Martin Rothbf3f94d2022-12-31 16:31:01 -0700[diff] [blame]60 post_code(POST_BOOTBLOCK_PRE_C_DONE)
Kyösti Mälkki33d0fb82019-11-29 06:38:46 +0200[diff] [blame]61
62 call bootblock_c_entry
Kyösti Mälkki63fac812017-09-02 16:41:43 +0300[diff] [blame]63
Michał Żygowski3aa17f72019-11-24 16:32:05 +0100[diff] [blame]64 /* Never reached. */
Kyösti Mälkki63fac812017-09-02 16:41:43 +0300[diff] [blame]65
Kyösti Mälkkiba22e152016-11-23 06:47:15 +0200[diff] [blame]66stop:
lilacious40cb3fe2023-06-21 23:24:14 +0200[diff] [blame^]67 post_code(POSTCODE_DEAD_CODE)
Elyes HAOUASdea45c12018-12-27 09:14:07 +0100[diff] [blame]68 hlt
69 jmp stop
Kyösti Mälkki63fac812017-09-02 16:41:43 +0300[diff] [blame]70
Michał Żygowski3aa17f72019-11-24 16:32:05 +0100[diff] [blame]71ap_entry:
Kyösti Mälkki33d0fb82019-11-29 06:38:46 +0200[diff] [blame]72 /* Align the stack for call to ap_bootblock_c_entry() */
Michał Żygowski3aa17f72019-11-24 16:32:05 +0100[diff] [blame]73 and $0xfffffff0, %esp
Kyösti Mälkki33d0fb82019-11-29 06:38:46 +0200[diff] [blame]74 call ap_bootblock_c_entry
Michał Żygowski3aa17f72019-11-24 16:32:05 +0100[diff] [blame]75
76 /* Never reached. */
77 jmp stop
78
Kyösti Mälkki7076aa52017-09-02 16:20:15 +0300[diff] [blame]79_cache_as_ram_setup_end: