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 #define CacheSize CONFIG_DCACHE_RAM_SIZE
22 #define CacheBase (0xd0000 - CacheSize)
24 /* leave some space for global variable to pass to RAM stage */
25 #define GlobalVarSize CONFIG_DCACHE_RAM_GLOBAL_VAR_SIZE
27 /* for CAR with FAM10 */
28 #define CacheSizeAPStack 0x400 /* 1K */
30 #define MSR_FAM10 0xC001102A
32 #define jmp_if_k8(x) comisd %xmm2, %xmm1; jb x
34 #define CPUID_MASK 0x0ff00f00
35 #define CPUID_VAL_FAM10_ROTATED 0x0f000010
37 #include <cpu/x86/mtrr.h>
38 #include <cpu/amd/mtrr.h>
42 xmm2: fam10 comparison value
46 /* Save the BIST result */
49 /*for normal part %ebx already contain cpu_init_detected from fallback call */
61 /* figure out cpu family */
65 /* base family is bits 8..11, extended family is bits 20..27 */
66 andl $CPUID_MASK, %eax
67 /* reorder bits for easier comparison by value */
70 movl $CPUID_VAL_FAM10_ROTATED, %eax
74 /* check if cpu_init_detected */
75 movl $MTRRdefType_MSR, %ecx
78 movl %eax, %ebx /* We store the status */
80 jmp_if_k8(CAR_FAM10_out_post_errata)
82 /* for GH, CAR need to set DRAM Base/Limit Registers to direct that to node0 */
84 /* Only BSP needed, for other nodes set during HT/memory init. */
85 /* So we need to check if it is BSP */
91 /* Enable RT tables on BSP */
92 movl $0x8000c06c, %eax
100 /* Setup temporary DRAM map: [0,16M) bit 0-23 */
101 movl $0x8000c144, %eax
108 movl $0x8000c140, %eax
117 /* Errata 193: Disable clean copybacks to L3 cache to allow cached ROM.
118 Re-enable it in after RAM is initialized and before CAR is disabled */
119 movl $0xc001102a, %ecx
124 /* Erratum 343, RevGuide for Fam10h, Pub#41322 Rev. 3.33 */
126 /* read-address has to be stored in the ecx register */
127 movl $MSR_FAM10, %ecx
129 /* execute special read command for msr-register. Result is then in the EDX:EAX-registers (MSBs in EDX) */
132 /* Set bit 35 to 1 in EAX */
135 /* write back the modified register EDX:EAX to the MSR specified in ECX */
138 /* Erratum 343 end */
140 CAR_FAM10_out_post_errata:
142 /* Set MtrrFixDramModEn for clear fixed mtrr */
143 enable_fixed_mtrr_dram_modify:
144 movl $SYSCFG_MSR, %ecx
146 andl $(~(SYSCFG_MSR_MtrrFixDramEn | SYSCFG_MSR_MtrrVarDramEn)), %eax
147 orl $SYSCFG_MSR_MtrrFixDramModEn, %eax
150 /* Clear all MTRRs */
152 movl $fixed_mtrr_msr, %esi
154 clear_fixed_var_mtrr:
157 jz clear_fixed_var_mtrr_out
163 jmp clear_fixed_var_mtrr
164 clear_fixed_var_mtrr_out:
166 /* 0x06 is the WB IO type for a given 4k segment.
167 * 0x1e is the MEM IO type for a given 4k segment (K10 and above).
168 * segs is the number of 4k segments in the area of the particular
169 * register we want to use for CAR.
170 * reg is the register where the IO type should be stored.
172 .macro extractmask segs, reg
174 /* The xorl here is superfluous because at the point of first execution
175 * of this macro, %eax and %edx are cleared. Later invocations of this
176 * macro will have a monotonically increasing segs parameter.
183 movl $0x1e000000, \reg /* WB MEM type */
185 movl $0x1e1e0000, \reg /* WB MEM type */
187 movl $0x1e1e1e00, \reg /* WB MEM type */
189 movl $0x1e1e1e1e, \reg /* WB MEM type */
194 movl $0x06000000, \reg /* WB IO type */
196 movl $0x06060000, \reg /* WB IO type */
198 movl $0x06060600, \reg /* WB IO type */
200 movl $0x06060606, \reg /* WB IO type */
203 .endif /* if \segs <= 0 */
206 /* size is the cache size in bytes we want to use for CAR.
207 * windowoffset is the 32k-aligned window into CAR size
209 .macro simplemask carsize, windowoffset
210 .set gas_bug_workaround,(((\carsize - \windowoffset) / 0x1000) - 4)
211 extractmask gas_bug_workaround, %eax
212 .set gas_bug_workaround,(((\carsize - \windowoffset) / 0x1000))
213 extractmask gas_bug_workaround, %edx
214 /* Without the gas bug workaround, the entire macro would consist only of the
216 extractmask (((\carsize - \windowoffset) / 0x1000) - 4), %eax
217 extractmask (((\carsize - \windowoffset) / 0x1000)), %edx
221 #if CacheSize > 0x10000
222 #error Invalid CAR size, must be at most 64k.
224 #if CacheSize < 0x1000
225 #error Invalid CAR size, must be at least 4k. This is a processor limitation.
227 #if (CacheSize & (0x1000 - 1))
228 #error Invalid CAR size, is not a multiple of 4k. This is a processor limitation.
231 #if CacheSize > 0x8000
232 /* enable caching for 32K-64K using fixed mtrr */
233 movl $0x268, %ecx /* fix4k_c0000*/
234 simplemask CacheSize, 0x8000
238 /* enable caching for 0-32K using fixed mtrr */
239 movl $0x269, %ecx /* fix4k_c8000*/
240 simplemask CacheSize, 0
243 /* enable memory access for first MBs using top_mem */
246 movl $(((CONFIG_RAMTOP) + TOP_MEM_MASK) & ~TOP_MEM_MASK) , %eax
249 #if defined(CONFIG_XIP_ROM_SIZE) && defined(CONFIG_XIP_ROM_BASE)
250 /* enable write base caching so we can do execute in place
256 #if defined(CONFIG_TINY_BOOTBLOCK) && CONFIG_TINY_BOOTBLOCK
257 #define REAL_XIP_ROM_BASE AUTO_XIP_ROM_BASE
259 #define REAL_XIP_ROM_BASE CONFIG_XIP_ROM_BASE
261 movl $REAL_XIP_ROM_BASE, %eax
262 orl $MTRR_TYPE_WRBACK, %eax
266 movl $0xff, %edx /* (1 << (CONFIG_CPU_ADDR_BITS - 32)) - 1 for K8 (CONFIG_CPU_ADDR_BITS = 40) */
267 jmp_if_k8(wbcache_post_fam10_setup)
268 movl $0xffff, %edx /* (1 << (CONFIG_CPU_ADDR_BITS - 32)) - 1 for FAM10 (CONFIG_CPU_ADDR_BITS = 48) */
269 wbcache_post_fam10_setup:
270 movl $(~(CONFIG_XIP_ROM_SIZE - 1) | 0x800), %eax
272 #endif /* CONFIG_XIP_ROM_SIZE && CONFIG_XIP_ROM_BASE */
274 /* Set the default memory type and enable fixed and variable MTRRs */
275 movl $MTRRdefType_MSR, %ecx
277 /* Enable Variable and Fixed MTRRs */
278 movl $0x00000c00, %eax
281 /* Enable the MTRRs and IORRs in SYSCFG */
282 movl $SYSCFG_MSR, %ecx
284 orl $(SYSCFG_MSR_MtrrVarDramEn | SYSCFG_MSR_MtrrFixDramEn), %eax
292 andl $0x9fffffff, %eax
295 jmp_if_k8(fam10_end_part1)
297 /* So we need to check if it is BSP */
307 /* Read the range with lodsl*/
309 movl $CacheBase, %esi
310 movl $(CacheSize >> 2), %ecx
313 /* Clear the range */
314 movl $CacheBase, %edi
315 movl $(CacheSize >> 2), %ecx
319 /* set up the stack pointer */
320 movl $(CacheBase + CacheSize - GlobalVarSize), %eax
328 /* need to set stack pointer for AP */
329 /* it will be from CacheBase + (CacheSize - GlobalVarSize)/2 - (NodeID<<CoreIDbits + CoreID) * CacheSizeAPStack*/
330 /* So need to get the NodeID and CoreID at first */
331 /* If NB_CFG bit 54 is set just use initial apicid, otherwise need to reverse it */
333 /* store our init detected */
336 /* get the coreid bits at first */
337 movl $0x80000008, %eax
343 /* get the initial apic id */
348 /* get the nb cfg bit 54 */
349 movl $0xc001001f, %ecx /* NB_CFG_MSR */
351 movl %edi, %ecx /* CoreID bits */
357 /* calculate stack pointer */
358 movl $CacheSizeAPStack, %eax
360 movl $(CacheBase + (CacheSize - GlobalVarSize)/2), %esp
363 /* retrive init detected */
379 /* Restore the BIST result */
382 /* We need to set ebp ? No need */
384 pushl %ebx /* init detected */
385 pushl %eax /* bist */
386 call cache_as_ram_main
387 /* We will not go back */
389 movb $0xAF, %al /* Should never see this postcode */
393 .long 0x250, 0x258, 0x259
394 .long 0x268, 0x269, 0x26A
395 .long 0x26B, 0x26C, 0x26D
398 .long 0x200, 0x201, 0x202, 0x203
399 .long 0x204, 0x205, 0x206, 0x207
400 .long 0x208, 0x209, 0x20A, 0x20B
401 .long 0x20C, 0x20D, 0x20E, 0x20F
403 .long 0xC0010016, 0xC0010017, 0xC0010018, 0xC0010019
405 .long 0xC001001A, 0xC001001D
406 .long 0x000 /* NULL, end of table */
408 cache_as_ram_setup_out: