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 */
59 /* figure out cpu family */
63 /* base family is bits 8..11, extended family is bits 20..27 */
64 andl $CPUID_MASK, %eax
65 /* reorder bits for easier comparison by value */
68 movl $CPUID_VAL_FAM10_ROTATED, %eax
72 /* check if cpu_init_detected */
73 movl $MTRRdefType_MSR, %ecx
76 movl %eax, %ebx /* We store the status */
78 jmp_if_k8(CAR_FAM10_out_post_errata)
80 /* for GH, CAR need to set DRAM Base/Limit Registers to direct that to node0 */
82 /* Only BSP needed, for other nodes set during HT/memory init. */
83 /* So we need to check if it is BSP */
89 /* Enable RT tables on BSP */
90 movl $0x8000c06c, %eax
98 /* Setup temporary DRAM map: [0,16M) bit 0-23 */
99 movl $0x8000c144, %eax
106 movl $0x8000c140, %eax
115 /* Errata 193: Disable clean copybacks to L3 cache to allow cached ROM.
116 Re-enable it in after RAM is initialized and before CAR is disabled */
117 movl $0xc001102a, %ecx
122 /* Erratum 343, RevGuide for Fam10h, Pub#41322 Rev. 3.33 */
124 /* read-address has to be stored in the ecx register */
125 movl $MSR_FAM10, %ecx
127 /* execute special read command for msr-register. Result is then in the EDX:EAX-registers (MSBs in EDX) */
130 /* Set bit 35 to 1 in EAX */
133 /* write back the modified register EDX:EAX to the MSR specified in ECX */
136 /* Erratum 343 end */
138 CAR_FAM10_out_post_errata:
140 /* Set MtrrFixDramModEn for clear fixed mtrr */
141 enable_fixed_mtrr_dram_modify:
142 movl $SYSCFG_MSR, %ecx
144 andl $(~(SYSCFG_MSR_MtrrFixDramEn | SYSCFG_MSR_MtrrVarDramEn)), %eax
145 orl $SYSCFG_MSR_MtrrFixDramModEn, %eax
148 /* Clear all MTRRs */
150 movl $fixed_mtrr_msr, %esi
152 clear_fixed_var_mtrr:
155 jz clear_fixed_var_mtrr_out
161 jmp clear_fixed_var_mtrr
162 clear_fixed_var_mtrr_out:
164 /* 0x06 is the WB IO type for a given 4k segment.
165 * 0x1e is the MEM IO type for a given 4k segment (K10 and above).
166 * segs is the number of 4k segments in the area of the particular
167 * register we want to use for CAR.
168 * reg is the register where the IO type should be stored.
170 .macro extractmask segs, reg
172 /* The xorl here is superfluous because at the point of first execution
173 * of this macro, %eax and %edx are cleared. Later invocations of this
174 * macro will have a monotonically increasing segs parameter.
181 movl $0x1e000000, \reg /* WB MEM type */
183 movl $0x1e1e0000, \reg /* WB MEM type */
185 movl $0x1e1e1e00, \reg /* WB MEM type */
187 movl $0x1e1e1e1e, \reg /* WB MEM type */
192 movl $0x06000000, \reg /* WB IO type */
194 movl $0x06060000, \reg /* WB IO type */
196 movl $0x06060600, \reg /* WB IO type */
198 movl $0x06060606, \reg /* WB IO type */
201 .endif /* if \segs <= 0 */
204 /* size is the cache size in bytes we want to use for CAR.
205 * windowoffset is the 32k-aligned window into CAR size
207 .macro simplemask carsize, windowoffset
208 .set gas_bug_workaround,(((\carsize - \windowoffset) / 0x1000) - 4)
209 extractmask gas_bug_workaround, %eax
210 .set gas_bug_workaround,(((\carsize - \windowoffset) / 0x1000))
211 extractmask gas_bug_workaround, %edx
212 /* Without the gas bug workaround, the entire macro would consist only of the
214 extractmask (((\carsize - \windowoffset) / 0x1000) - 4), %eax
215 extractmask (((\carsize - \windowoffset) / 0x1000)), %edx
219 #if CacheSize > 0x10000
220 #error Invalid CAR size, must be at most 64k.
222 #if CacheSize < 0x1000
223 #error Invalid CAR size, must be at least 4k. This is a processor limitation.
225 #if (CacheSize & (0x1000 - 1))
226 #error Invalid CAR size, is not a multiple of 4k. This is a processor limitation.
229 #if CacheSize > 0x8000
230 /* enable caching for 32K-64K using fixed mtrr */
231 movl $0x268, %ecx /* fix4k_c0000*/
232 simplemask CacheSize, 0x8000
236 /* enable caching for 0-32K using fixed mtrr */
237 movl $0x269, %ecx /* fix4k_c8000*/
238 simplemask CacheSize, 0
241 /* enable memory access for first MBs using top_mem */
244 movl $(((CONFIG_RAMTOP) + TOP_MEM_MASK) & ~TOP_MEM_MASK) , %eax
247 #if defined(CONFIG_XIP_ROM_SIZE) && defined(CONFIG_XIP_ROM_BASE)
248 /* enable write base caching so we can do execute in place
254 #if defined(CONFIG_TINY_BOOTBLOCK) && CONFIG_TINY_BOOTBLOCK
255 #define REAL_XIP_ROM_BASE AUTO_XIP_ROM_BASE
257 #define REAL_XIP_ROM_BASE CONFIG_XIP_ROM_BASE
259 movl $REAL_XIP_ROM_BASE, %eax
260 orl $MTRR_TYPE_WRBACK, %eax
264 movl $0xff, %edx /* (1 << (CONFIG_CPU_ADDR_BITS - 32)) - 1 for K8 (CONFIG_CPU_ADDR_BITS = 40) */
265 jmp_if_k8(wbcache_post_fam10_setup)
266 movl $0xffff, %edx /* (1 << (CONFIG_CPU_ADDR_BITS - 32)) - 1 for FAM10 (CONFIG_CPU_ADDR_BITS = 48) */
267 wbcache_post_fam10_setup:
268 movl $(~(CONFIG_XIP_ROM_SIZE - 1) | 0x800), %eax
270 #endif /* CONFIG_XIP_ROM_SIZE && CONFIG_XIP_ROM_BASE */
272 /* Set the default memory type and enable fixed and variable MTRRs */
273 movl $MTRRdefType_MSR, %ecx
275 /* Enable Variable and Fixed MTRRs */
276 movl $0x00000c00, %eax
279 /* Enable the MTRRs and IORRs in SYSCFG */
280 movl $SYSCFG_MSR, %ecx
282 orl $(SYSCFG_MSR_MtrrVarDramEn | SYSCFG_MSR_MtrrFixDramEn), %eax
289 andl $0x9fffffff, %eax
292 jmp_if_k8(fam10_end_part1)
294 /* So we need to check if it is BSP */
303 /* Read the range with lodsl*/
305 movl $CacheBase, %esi
306 movl $(CacheSize >> 2), %ecx
309 /* Clear the range */
310 movl $CacheBase, %edi
311 movl $(CacheSize >> 2), %ecx
315 /* set up the stack pointer */
316 movl $(CacheBase + CacheSize - GlobalVarSize), %eax
323 /* need to set stack pointer for AP */
324 /* it will be from CacheBase + (CacheSize - GlobalVarSize)/2 - (NodeID<<CoreIDbits + CoreID) * CacheSizeAPStack*/
325 /* So need to get the NodeID and CoreID at first */
326 /* If NB_CFG bit 54 is set just use initial apicid, otherwise need to reverse it */
328 /* store our init detected */
331 /* get the coreid bits at first */
332 movl $0x80000008, %eax
338 /* get the initial apic id */
343 /* get the nb cfg bit 54 */
344 movl $0xc001001f, %ecx /* NB_CFG_MSR */
346 movl %edi, %ecx /* CoreID bits */
352 /* calculate stack pointer */
353 movl $CacheSizeAPStack, %eax
355 movl $(CacheBase + (CacheSize - GlobalVarSize)/2), %esp
358 /* retrive init detected */
372 /* Restore the BIST result */
375 /* We need to set ebp ? No need */
377 pushl %ebx /* init detected */
378 pushl %eax /* bist */
379 call cache_as_ram_main
380 /* We will not go back */
382 post_code(0xaf) /* Should never see this postcode */
385 .long 0x250, 0x258, 0x259
386 .long 0x268, 0x269, 0x26A
387 .long 0x26B, 0x26C, 0x26D
390 .long 0x200, 0x201, 0x202, 0x203
391 .long 0x204, 0x205, 0x206, 0x207
392 .long 0x208, 0x209, 0x20A, 0x20B
393 .long 0x20C, 0x20D, 0x20E, 0x20F
395 .long 0xC0010016, 0xC0010017, 0xC0010018, 0xC0010019
397 .long 0xC001001A, 0xC001001D
398 .long 0x000 /* NULL, end of table */
400 cache_as_ram_setup_out: