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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 31f57c28736d9a070fe56c55d57e9da406ee86ba / . / arch / x86 / cpu / ivybridge / car.S
blob: 9441666f5aa037b99bd40e1fea5dba2a349feab9 [file] [log] [blame]
Simon Glass8ef07572014-11-12 22:42:07 -0700[diff] [blame]1/*
2 * Copyright (c) 2014 Google, Inc
3 *
4 * From Coreboot file cpu/intel/model_206ax/cache_as_ram.inc
5 *
6 * Copyright (C) 2000,2007 Ronald G. Minnich <rminnich@gmail.com>
7 * Copyright (C) 2005 Tyan (written by Yinghai Lu for Tyan)
8 * Copyright (C) 2007-2008 coresystems GmbH
9 * Copyright (C) 2012 Kyösti Mälkki <kyosti.malkki@gmail.com>
10 *
11 * SPDX-License-Identifier: GPL-2.0
12 */
13
14#include <common.h>
Simon Glassc72f74e2015-01-01 16:18:14 -0700[diff] [blame]15#include <asm/msr-index.h>
Simon Glass70a09c62014-11-12 22:42:10 -0700[diff] [blame]16#include <asm/mtrr.h>
17#include <asm/post.h>
18#include <asm/processor-flags.h>
Simon Glassc72f74e2015-01-01 16:18:14 -0700[diff] [blame]19#include <asm/arch/microcode.h>
Simon Glass8ef07572014-11-12 22:42:07 -0700[diff] [blame]20
Simon Glass70a09c62014-11-12 22:42:10 -0700[diff] [blame]21#define MTRR_PHYS_BASE_MSR(reg) (0x200 + 2 * (reg))
22#define MTRR_PHYS_MASK_MSR(reg) (0x200 + 2 * (reg) + 1)
23
24#define CACHE_AS_RAM_SIZE CONFIG_DCACHE_RAM_SIZE
25#define CACHE_AS_RAM_BASE CONFIG_DCACHE_RAM_BASE
26
27/* Cache 4GB - MRC_SIZE_KB for MRC */
28#define CACHE_MRC_BYTES ((CONFIG_CACHE_MRC_SIZE_KB << 10) - 1)
29#define CACHE_MRC_BASE (0xFFFFFFFF - CACHE_MRC_BYTES)
30#define CACHE_MRC_MASK (~CACHE_MRC_BYTES)
31
32#define CPU_PHYSMASK_HI (1 << (CONFIG_CPU_ADDR_BITS - 32) - 1)
33
34#define NOEVICTMOD_MSR 0x2e0
35
36 /*
37 * Note: ebp must not be touched in this code as it holds the BIST
38 * value (built-in self test). We preserve this value until it can
39 * be written to global_data when CAR is ready for use.
40 */
Simon Glass8ef07572014-11-12 22:42:07 -0700[diff] [blame]41.globl car_init
42car_init:
Simon Glass70a09c62014-11-12 22:42:10 -0700[diff] [blame]43 post_code(POST_CAR_START)
44
45 /* Send INIT IPI to all excluding ourself */
46 movl $0x000C4500, %eax
47 movl $0xFEE00300, %esi
48 movl %eax, (%esi)
49
Simon Glassc72f74e2015-01-01 16:18:14 -0700[diff] [blame]50 /* TODO: Load microcode later - the 'no eviction' mode breaks this */
51 movl $MSR_IA32_UCODE_WRITE, %ecx
52 xorl %edx, %edx
53 movl $_dt_ucode_base_size, %eax
54 movl (%eax), %eax
55 addl $UCODE_HEADER_LEN, %eax
56 wrmsr
57
Simon Glass70a09c62014-11-12 22:42:10 -0700[diff] [blame]58 post_code(POST_CAR_SIPI)
59 /* Zero out all fixed range and variable range MTRRs */
60 movl $mtrr_table, %esi
61 movl $((mtrr_table_end - mtrr_table) / 2), %edi
62 xorl %eax, %eax
63 xorl %edx, %edx
64clear_mtrrs:
65 movw (%esi), %bx
66 movzx %bx, %ecx
67 wrmsr
68 add $2, %esi
69 dec %edi
70 jnz clear_mtrrs
71
72 post_code(POST_CAR_MTRR)
73 /* Configure the default memory type to uncacheable */
Simon Glassaff25232015-01-01 16:18:07 -0700[diff] [blame]74 movl $MTRR_DEF_TYPE_MSR, %ecx
Simon Glass70a09c62014-11-12 22:42:10 -0700[diff] [blame]75 rdmsr
76 andl $(~0x00000cff), %eax
77 wrmsr
78
79 post_code(POST_CAR_UNCACHEABLE)
80 /* Set Cache-as-RAM base address */
81 movl $(MTRR_PHYS_BASE_MSR(0)), %ecx
82 movl $(CACHE_AS_RAM_BASE | MTRR_TYPE_WRBACK), %eax
83 xorl %edx, %edx
84 wrmsr
85
86 post_code(POST_CAR_BASE_ADDRESS)
87 /* Set Cache-as-RAM mask */
88 movl $(MTRR_PHYS_MASK_MSR(0)), %ecx
Simon Glassaff25232015-01-01 16:18:07 -0700[diff] [blame]89 movl $(~(CACHE_AS_RAM_SIZE - 1) | MTRR_PHYS_MASK_VALID), %eax
Simon Glass70a09c62014-11-12 22:42:10 -0700[diff] [blame]90 movl $CPU_PHYSMASK_HI, %edx
91 wrmsr
92
93 post_code(POST_CAR_MASK)
94
95 /* Enable MTRR */
Simon Glassaff25232015-01-01 16:18:07 -0700[diff] [blame]96 movl $MTRR_DEF_TYPE_MSR, %ecx
Simon Glass70a09c62014-11-12 22:42:10 -0700[diff] [blame]97 rdmsr
Simon Glassaff25232015-01-01 16:18:07 -0700[diff] [blame]98 orl $MTRR_DEF_TYPE_EN, %eax
Simon Glass70a09c62014-11-12 22:42:10 -0700[diff] [blame]99 wrmsr
100
101 /* Enable cache (CR0.CD = 0, CR0.NW = 0) */
102 movl %cr0, %eax
103 andl $(~(X86_CR0_CD | X86_CR0_NW)), %eax
104 invd
105 movl %eax, %cr0
106
107 /* enable the 'no eviction' mode */
108 movl $NOEVICTMOD_MSR, %ecx
109 rdmsr
110 orl $1, %eax
111 andl $~2, %eax
112 wrmsr
113
114 /* Clear the cache memory region. This will also fill up the cache */
115 movl $CACHE_AS_RAM_BASE, %esi
116 movl %esi, %edi
117 movl $(CACHE_AS_RAM_SIZE / 4), %ecx
118 xorl %eax, %eax
119 rep stosl
120
121 /* enable the 'no eviction run' state */
122 movl $NOEVICTMOD_MSR, %ecx
123 rdmsr
124 orl $3, %eax
125 wrmsr
126
127 post_code(POST_CAR_FILL)
128 /* Enable Cache-as-RAM mode by disabling cache */
129 movl %cr0, %eax
130 orl $X86_CR0_CD, %eax
131 movl %eax, %cr0
132
133 /* Enable cache for our code in Flash because we do XIP here */
134 movl $MTRR_PHYS_BASE_MSR(1), %ecx
135 xorl %edx, %edx
136 movl $car_init_ret, %eax
137 andl $(~(CONFIG_XIP_ROM_SIZE - 1)), %eax
138 orl $MTRR_TYPE_WRPROT, %eax
139 wrmsr
140
141 movl $MTRR_PHYS_MASK_MSR(1), %ecx
142 movl $CPU_PHYSMASK_HI, %edx
Simon Glassaff25232015-01-01 16:18:07 -0700[diff] [blame]143 movl $(~(CONFIG_XIP_ROM_SIZE - 1) | MTRR_PHYS_MASK_VALID), %eax
Simon Glass70a09c62014-11-12 22:42:10 -0700[diff] [blame]144 wrmsr
145
146 post_code(POST_CAR_ROM_CACHE)
147#ifdef CONFIG_CACHE_MRC_BIN
148 /* Enable caching for ram init code to run faster */
149 movl $MTRR_PHYS_BASE_MSR(2), %ecx
150 movl $(CACHE_MRC_BASE | MTRR_TYPE_WRPROT), %eax
151 xorl %edx, %edx
152 wrmsr
153 movl $MTRR_PHYS_MASK_MSR(2), %ecx
Simon Glassaff25232015-01-01 16:18:07 -0700[diff] [blame]154 movl $(CACHE_MRC_MASK | MTRR_PHYS_MASK_VALID), %eax
Simon Glass70a09c62014-11-12 22:42:10 -0700[diff] [blame]155 movl $CPU_PHYSMASK_HI, %edx
156 wrmsr
157#endif
158
159 post_code(POST_CAR_MRC_CACHE)
160 /* Enable cache */
161 movl %cr0, %eax
162 andl $(~(X86_CR0_CD | X86_CR0_NW)), %eax
163 movl %eax, %cr0
164
165 post_code(POST_CAR_CPU_CACHE)
166
167 /* All CPUs need to be in Wait for SIPI state */
168wait_for_sipi:
169 movl (%esi), %eax
170 bt $12, %eax
171 jc wait_for_sipi
172
173 /* return */
Simon Glass8ef07572014-11-12 22:42:07 -0700[diff] [blame]174 jmp car_init_ret
Simon Glass70a09c62014-11-12 22:42:10 -0700[diff] [blame]175
Simon Glass7b008962015-01-01 16:18:12 -0700[diff] [blame]176.globl car_uninit
177car_uninit:
178 /* Disable cache */
179 movl %cr0, %eax
180 orl $X86_CR0_CD, %eax
181 movl %eax, %cr0
182
183 /* Disable MTRRs */
184 movl $MTRR_DEF_TYPE_MSR, %ecx
185 rdmsr
186 andl $(~MTRR_DEF_TYPE_EN), %eax
187 wrmsr
188
189 /* Disable the no-eviction run state */
190 movl NOEVICTMOD_MSR, %ecx
191 rdmsr
192 andl $~2, %eax
193 wrmsr
194
195 invd
196
197 /* Disable the no-eviction mode */
198 rdmsr
199 andl $~1, %eax
200 wrmsr
201
202#ifdef CONFIG_CACHE_MRC_BIN
203 /* Clear the MTRR that was used to cache MRC */
204 xorl %eax, %eax
205 xorl %edx, %edx
206 movl $MTRR_PHYS_BASE_MSR(2), %ecx
207 wrmsr
208 movl $MTRR_PHYS_MASK_MSR(2), %ecx
209 wrmsr
210#endif
211
212 /* Enable MTRRs */
213 movl $MTRR_DEF_TYPE_MSR, %ecx
214 rdmsr
215 orl $MTRR_DEF_TYPE_EN, %eax
216 wrmsr
217
218 invd
219
220 ret
221
Simon Glass70a09c62014-11-12 22:42:10 -0700[diff] [blame]222mtrr_table:
223 /* Fixed MTRRs */
224 .word 0x250, 0x258, 0x259
225 .word 0x268, 0x269, 0x26A
226 .word 0x26B, 0x26C, 0x26D
227 .word 0x26E, 0x26F
228 /* Variable MTRRs */
229 .word 0x200, 0x201, 0x202, 0x203
230 .word 0x204, 0x205, 0x206, 0x207
231 .word 0x208, 0x209, 0x20A, 0x20B
232 .word 0x20C, 0x20D, 0x20E, 0x20F
233 .word 0x210, 0x211, 0x212, 0x213
234mtrr_table_end:
Simon Glassc72f74e2015-01-01 16:18:14 -0700[diff] [blame]235
236 .align 4
237_dt_ucode_base_size:
238 /* These next two fields are filled in by ifdtool */
239 .long 0 /* microcode base */
240 .long 0 /* microcode size */