2 * This file is part of the coreboot project.
4 * Copyright (C) 2005-2007 Advanced Micro Devices, Inc.
5 * Copyright (C) 2008 Carl-Daniel Hailfinger
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include <cpu/x86/mtrr.h>
22 #include <cpu/amd/mtrr.h>
24 #define CacheSize CONFIG_DCACHE_RAM_SIZE
25 #define CacheBase (0xd0000 - CacheSize)
27 /* Leave some space for global variable to pass to RAM stage. */
28 #define GlobalVarSize CONFIG_DCACHE_RAM_GLOBAL_VAR_SIZE
30 /* For CAR with Fam10h. */
31 #define CacheSizeAPStack 0x400 /* 1K */
33 #define MSR_MCFG_BASE 0xC0010058
34 #define MSR_FAM10 0xC001102A
36 #define jmp_if_k8(x) comisd %xmm2, %xmm1; jb x
38 #define CPUID_MASK 0x0ff00f00
39 #define CPUID_VAL_FAM10_ROTATED 0x0f000010
44 * xmm2: Fam10h comparison value
48 /* Save the BIST result. */
52 * For normal part %ebx already contain cpu_init_detected
64 /* Figure out the CPU family. */
68 /* Base family is bits 8..11, extended family is bits 20..27. */
69 andl $CPUID_MASK, %eax
70 /* Reorder bits for easier comparison by value. */
73 movl $CPUID_VAL_FAM10_ROTATED, %eax
77 /* Check if cpu_init_detected. */
78 movl $MTRRdefType_MSR, %ecx
81 movl %eax, %ebx /* We store the status. */
83 jmp_if_k8(CAR_FAM10_out_post_errata)
86 * For GH, CAR need to set DRAM Base/Limit registers to direct that
88 * Only BSP needed, for other nodes set during HT/memory init.
89 * So we need to check if it is BSP.
96 /* Enable RT tables on BSP. */
97 movl $0x8000c06c, %eax
105 /* Setup temporary DRAM map: [0,16M) bit 0-23. */
106 movl $0x8000c144, %eax
113 movl $0x8000c140, %eax
123 * Errata 193: Disable clean copybacks to L3 cache to allow cached ROM.
124 * Re-enable it in after RAM is initialized and before CAR is disabled.
126 movl $MSR_FAM10, %ecx
131 /* Erratum 343, RevGuide for Fam10h, Pub#41322 Rev. 3.33 */
132 movl $MSR_FAM10, %ecx
134 bts $35-32, %edx /* Set bit 35 in EDX:EAX (bit 3 in EDX). */
137 #if CONFIG_MMCONF_SUPPORT
138 /* Set MMIO config space BAR. */
139 movl $MSR_MCFG_BASE, %ecx
141 andl $(~(0xfff00000 | (0xf << 2))), %eax
142 orl $((CONFIG_MMCONF_BASE_ADDRESS & 0xfff00000), %eax
143 orl $((8 << 2) | (1 << 0)), %eax
144 andl $(~(0x0000ffff)), %edx
145 orl $(CONFIG_MMCONF_BASE_ADDRESS >> 32), %edx
149 CAR_FAM10_out_post_errata:
151 /* Set MtrrFixDramModEn for clear fixed MTRR. */
152 enable_fixed_mtrr_dram_modify:
153 movl $SYSCFG_MSR, %ecx
155 andl $(~(SYSCFG_MSR_MtrrFixDramEn | SYSCFG_MSR_MtrrVarDramEn)), %eax
156 orl $SYSCFG_MSR_MtrrFixDramModEn, %eax
159 /* Clear all MTRRs. */
161 movl $fixed_mtrr_msr, %esi
163 clear_fixed_var_mtrr:
166 jz clear_fixed_var_mtrr_out
172 jmp clear_fixed_var_mtrr
173 clear_fixed_var_mtrr_out:
176 * 0x06 is the WB IO type for a given 4k segment.
177 * 0x1e is the MEM IO type for a given 4k segment (K10 and above).
178 * segs is the number of 4k segments in the area of the particular
179 * register we want to use for CAR.
180 * reg is the register where the IO type should be stored.
182 .macro extractmask segs, reg
185 * The xorl here is superfluous because at the point of first execution
186 * of this macro, %eax and %edx are cleared. Later invocations of this
187 * macro will have a monotonically increasing segs parameter.
194 movl $0x1e000000, \reg /* WB MEM type */
196 movl $0x1e1e0000, \reg /* WB MEM type */
198 movl $0x1e1e1e00, \reg /* WB MEM type */
200 movl $0x1e1e1e1e, \reg /* WB MEM type */
205 movl $0x06000000, \reg /* WB IO type */
207 movl $0x06060000, \reg /* WB IO type */
209 movl $0x06060600, \reg /* WB IO type */
211 movl $0x06060606, \reg /* WB IO type */
214 .endif /* if \segs <= 0 */
218 * carsize is the cache size in bytes we want to use for CAR.
219 * windowoffset is the 32k-aligned window into CAR size.
221 .macro simplemask carsize, windowoffset
222 .set gas_bug_workaround,(((\carsize - \windowoffset) / 0x1000) - 4)
223 extractmask gas_bug_workaround, %eax
224 .set gas_bug_workaround,(((\carsize - \windowoffset) / 0x1000))
225 extractmask gas_bug_workaround, %edx
227 * Without the gas bug workaround, the entire macro would consist
228 * only of the two lines below:
229 * extractmask (((\carsize - \windowoffset) / 0x1000) - 4), %eax
230 * extractmask (((\carsize - \windowoffset) / 0x1000)), %edx
234 #if CacheSize > 0x10000
235 #error Invalid CAR size, must be at most 64k.
237 #if CacheSize < 0x1000
238 #error Invalid CAR size, must be at least 4k. This is a processor limitation.
240 #if (CacheSize & (0x1000 - 1))
241 #error Invalid CAR size, is not a multiple of 4k. This is a processor limitation.
244 #if CacheSize > 0x8000
245 /* Enable caching for 32K-64K using fixed MTRR. */
246 movl $MTRRfix4K_C0000_MSR, %ecx
247 simplemask CacheSize, 0x8000
251 /* Enable caching for 0-32K using fixed MTRR. */
252 movl $MTRRfix4K_C8000_MSR, %ecx
253 simplemask CacheSize, 0
256 /* Enable memory access for first MBs using top_mem. */
259 movl $(((CONFIG_RAMTOP) + TOP_MEM_MASK) & ~TOP_MEM_MASK) , %eax
262 #if defined(CONFIG_XIP_ROM_SIZE) && defined(CONFIG_XIP_ROM_BASE)
264 #if defined(CONFIG_TINY_BOOTBLOCK) && CONFIG_TINY_BOOTBLOCK
265 #define REAL_XIP_ROM_BASE AUTO_XIP_ROM_BASE
267 #define REAL_XIP_ROM_BASE CONFIG_XIP_ROM_BASE
270 /* Enable write base caching so we can do execute in place (XIP)
273 movl $MTRRphysBase_MSR(1), %ecx
275 movl $REAL_XIP_ROM_BASE, %eax
276 orl $MTRR_TYPE_WRBACK, %eax
279 movl $MTRRphysMask_MSR(1), %ecx
280 movl $0xff, %edx /* (1 << (CONFIG_CPU_ADDR_BITS - 32)) - 1 for K8 (CONFIG_CPU_ADDR_BITS = 40) */
281 jmp_if_k8(wbcache_post_fam10_setup)
282 movl $0xffff, %edx /* (1 << (CONFIG_CPU_ADDR_BITS - 32)) - 1 for FAM10 (CONFIG_CPU_ADDR_BITS = 48) */
283 wbcache_post_fam10_setup:
284 movl $(~(CONFIG_XIP_ROM_SIZE - 1) | 0x800), %eax
286 #endif /* CONFIG_XIP_ROM_SIZE && CONFIG_XIP_ROM_BASE */
288 /* Set the default memory type and enable fixed and variable MTRRs. */
289 movl $MTRRdefType_MSR, %ecx
291 movl $(MTRRdefTypeEn | MTRRdefTypeFixEn), %eax
294 /* Enable the MTRRs and IORRs in SYSCFG. */
295 movl $SYSCFG_MSR, %ecx
297 orl $(SYSCFG_MSR_MtrrVarDramEn | SYSCFG_MSR_MtrrFixDramEn), %eax
304 andl $(~((1 << 30) | (1 << 29))), %eax
307 jmp_if_k8(fam10_end_part1)
309 /* So we need to check if it is BSP. */
312 bt $8, %eax /* BSP */
318 /* Read the range with lodsl. */
320 movl $CacheBase, %esi
321 movl $(CacheSize >> 2), %ecx
324 /* Clear the range. */
325 movl $CacheBase, %edi
326 movl $(CacheSize >> 2), %ecx
330 /* Set up the stack pointer. */
331 movl $(CacheBase + CacheSize - GlobalVarSize), %eax
339 * Need to set stack pointer for AP.
341 * CacheBase + (CacheSize - GlobalVarSize) / 2
342 * - (NodeID << CoreIDbits + CoreID) * CacheSizeAPStack
343 * So need to get the NodeID and CoreID at first.
344 * If NB_CFG bit 54 is set just use initial APIC ID, otherwise need
348 /* Store our init detected. */
351 /* Get the coreid bits at first. */
352 movl $0x80000008, %eax
358 /* Get the initial APIC ID. */
363 /* Get the nb cfg bit 54. */
364 movl $0xc001001f, %ecx /* NB_CFG_MSR */
366 movl %edi, %ecx /* CoreID bits */
372 /* Calculate stack pointer. */
373 movl $CacheSizeAPStack, %eax
375 movl $(CacheBase + (CacheSize - GlobalVarSize) / 2), %esp
378 /* Retrive init detected. */
389 andl $~(3 << 9), %eax
392 /* Restore the BIST result. */
395 /* We need to set EBP? No need. */
397 pushl %ebx /* Init detected. */
398 pushl %eax /* BIST */
399 call cache_as_ram_main
400 /* We will not go back. */
402 post_code(0xaf) /* Should never see this POST code. */
405 .long 0x250, 0x258, 0x259
406 .long 0x268, 0x269, 0x26A
407 .long 0x26B, 0x26C, 0x26D
411 .long 0x200, 0x201, 0x202, 0x203
412 .long 0x204, 0x205, 0x206, 0x207
413 .long 0x208, 0x209, 0x20A, 0x20B
414 .long 0x20C, 0x20D, 0x20E, 0x20F
417 .long 0xC0010016, 0xC0010017, 0xC0010018, 0xC0010019
420 .long 0xC001001A, 0xC001001D
421 .long 0x000 /* NULL, end of table */
423 cache_as_ram_setup_out: