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/car.h>
22 #include <cpu/x86/mtrr.h>
23 #include <cpu/amd/mtrr.h>
25 #define CacheSize CONFIG_DCACHE_RAM_SIZE
26 #define CacheBase (0xd0000 - CacheSize)
28 /* Leave some space for global variable to pass to RAM stage. */
29 #define GlobalVarSize CONFIG_DCACHE_RAM_GLOBAL_VAR_SIZE
31 /* For CAR with Fam10h. */
32 #define CacheSizeAPStack 0x400 /* 1K */
34 #define MSR_MCFG_BASE 0xC0010058
35 #define MSR_FAM10 0xC001102A
37 #define jmp_if_k8(x) comisd %xmm2, %xmm1; jb x
39 #define CPUID_MASK 0x0ff00f00
40 #define CPUID_VAL_FAM10_ROTATED 0x0f000010
45 * xmm2: Fam10h comparison value
52 * For normal part %ebx already contain cpu_init_detected
61 /* Figure out the 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)
83 * For GH, CAR need to set DRAM Base/Limit registers to direct that
85 * Only BSP needed, for other nodes set during HT/memory init.
86 * So we need to check if it is BSP.
93 /* Enable RT tables on BSP. */
94 movl $0x8000c06c, %eax
102 /* Setup temporary DRAM map: [0,16M) bit 0-23. */
103 movl $0x8000c144, %eax
110 movl $0x8000c140, %eax
120 * Errata 193: Disable clean copybacks to L3 cache to allow cached ROM.
121 * Re-enable it in after RAM is initialized and before CAR is disabled.
123 movl $MSR_FAM10, %ecx
128 /* Erratum 343, RevGuide for Fam10h, Pub#41322 Rev. 3.33 */
129 movl $MSR_FAM10, %ecx
131 bts $35-32, %edx /* Set bit 35 in EDX:EAX (bit 3 in EDX). */
134 #if CONFIG_MMCONF_SUPPORT
135 /* Set MMIO config space BAR. */
136 movl $MSR_MCFG_BASE, %ecx
138 andl $(~(0xfff00000 | (0xf << 2))), %eax
139 orl $((CONFIG_MMCONF_BASE_ADDRESS & 0xfff00000)), %eax
140 orl $((8 << 2) | (1 << 0)), %eax
141 andl $(~(0x0000ffff)), %edx
142 orl $(CONFIG_MMCONF_BASE_ADDRESS >> 32), %edx
146 CAR_FAM10_out_post_errata:
148 /* Set MtrrFixDramModEn for clear fixed MTRR. */
149 enable_fixed_mtrr_dram_modify:
150 movl $SYSCFG_MSR, %ecx
152 andl $(~(SYSCFG_MSR_MtrrFixDramEn | SYSCFG_MSR_MtrrVarDramEn)), %eax
153 orl $SYSCFG_MSR_MtrrFixDramModEn, %eax
156 /* Clear all MTRRs. */
158 movl $all_mtrr_msrs, %esi
160 clear_fixed_var_mtrr:
163 jz clear_fixed_var_mtrr_out
169 jmp clear_fixed_var_mtrr
170 clear_fixed_var_mtrr_out:
173 * 0x06 is the WB IO type for a given 4k segment.
174 * 0x1e is the MEM IO type for a given 4k segment (K10 and above).
175 * segs is the number of 4k segments in the area of the particular
176 * register we want to use for CAR.
177 * reg is the register where the IO type should be stored.
179 .macro extractmask segs, reg
182 * The xorl here is superfluous because at the point of first execution
183 * of this macro, %eax and %edx are cleared. Later invocations of this
184 * macro will have a monotonically increasing segs parameter.
191 movl $0x1e000000, \reg /* WB MEM type */
193 movl $0x1e1e0000, \reg /* WB MEM type */
195 movl $0x1e1e1e00, \reg /* WB MEM type */
197 movl $0x1e1e1e1e, \reg /* WB MEM type */
202 movl $0x06000000, \reg /* WB IO type */
204 movl $0x06060000, \reg /* WB IO type */
206 movl $0x06060600, \reg /* WB IO type */
208 movl $0x06060606, \reg /* WB IO type */
211 .endif /* if \segs <= 0 */
215 * carsize is the cache size in bytes we want to use for CAR.
216 * windowoffset is the 32k-aligned window into CAR size.
218 .macro simplemask carsize, windowoffset
219 .set gas_bug_workaround,(((\carsize - \windowoffset) / 0x1000) - 4)
220 extractmask gas_bug_workaround, %eax
221 .set gas_bug_workaround,(((\carsize - \windowoffset) / 0x1000))
222 extractmask gas_bug_workaround, %edx
224 * Without the gas bug workaround, the entire macro would consist
225 * only of the two lines below:
226 * extractmask (((\carsize - \windowoffset) / 0x1000) - 4), %eax
227 * extractmask (((\carsize - \windowoffset) / 0x1000)), %edx
231 #if CacheSize > 0x10000
232 #error Invalid CAR size, must be at most 64k.
234 #if CacheSize < 0x1000
235 #error Invalid CAR size, must be at least 4k. This is a processor limitation.
237 #if (CacheSize & (0x1000 - 1))
238 #error Invalid CAR size, is not a multiple of 4k. This is a processor limitation.
241 #if CacheSize > 0x8000
242 /* Enable caching for 32K-64K using fixed MTRR. */
243 movl $MTRRfix4K_C0000_MSR, %ecx
244 simplemask CacheSize, 0x8000
248 /* Enable caching for 0-32K using fixed MTRR. */
249 movl $MTRRfix4K_C8000_MSR, %ecx
250 simplemask CacheSize, 0
253 /* Enable memory access for first MBs using top_mem. */
256 movl $(((CONFIG_RAMTOP) + TOP_MEM_MASK) & ~TOP_MEM_MASK) , %eax
259 #if defined(CONFIG_XIP_ROM_SIZE) && defined(CONFIG_XIP_ROM_BASE)
261 #if defined(CONFIG_TINY_BOOTBLOCK) && CONFIG_TINY_BOOTBLOCK
262 #define REAL_XIP_ROM_BASE AUTO_XIP_ROM_BASE
264 #define REAL_XIP_ROM_BASE CONFIG_XIP_ROM_BASE
267 /* Enable write base caching so we can do execute in place (XIP)
270 movl $MTRRphysBase_MSR(1), %ecx
273 * IMPORTANT: The two lines below can _not_ be written like this:
274 * movl $(REAL_XIP_ROM_BASE | MTRR_TYPE_WRBACK), %eax
275 * http://www.coreboot.org/pipermail/coreboot/2010-October/060855.html
277 movl $REAL_XIP_ROM_BASE, %eax
278 orl $MTRR_TYPE_WRBACK, %eax
281 movl $MTRRphysMask_MSR(1), %ecx
282 movl $0xff, %edx /* (1 << (CONFIG_CPU_ADDR_BITS - 32)) - 1 for K8 (CONFIG_CPU_ADDR_BITS = 40) */
283 jmp_if_k8(wbcache_post_fam10_setup)
284 movl $0xffff, %edx /* (1 << (CONFIG_CPU_ADDR_BITS - 32)) - 1 for FAM10 (CONFIG_CPU_ADDR_BITS = 48) */
285 wbcache_post_fam10_setup:
286 movl $(~(CONFIG_XIP_ROM_SIZE - 1) | 0x800), %eax
288 #endif /* CONFIG_XIP_ROM_SIZE && CONFIG_XIP_ROM_BASE */
290 /* Set the default memory type and enable fixed and variable MTRRs. */
291 movl $MTRRdefType_MSR, %ecx
293 movl $(MTRRdefTypeEn | MTRRdefTypeFixEn), %eax
296 /* Enable the MTRRs and IORRs in SYSCFG. */
297 movl $SYSCFG_MSR, %ecx
299 orl $(SYSCFG_MSR_MtrrVarDramEn | SYSCFG_MSR_MtrrFixDramEn), %eax
306 jmp_if_k8(fam10_end_part1)
308 /* So we need to check if it is BSP. */
311 bt $8, %eax /* BSP */
317 /* Read the range with lodsl. */
319 movl $CacheBase, %esi
320 movl $(CacheSize >> 2), %ecx
323 /* Clear the range. */
324 movl $CacheBase, %edi
325 movl $(CacheSize >> 2), %ecx
329 /* Set up the stack pointer. */
330 movl $(CacheBase + CacheSize - GlobalVarSize), %eax
338 * Need to set stack pointer for AP.
340 * CacheBase + (CacheSize - GlobalVarSize) / 2
341 * - (NodeID << CoreIDbits + CoreID) * CacheSizeAPStack
342 * So need to get the NodeID and CoreID at first.
343 * If NB_CFG bit 54 is set just use initial APIC ID, otherwise need
347 /* Store our init detected. */
350 /* Get the coreid bits at first. */
351 movl $0x80000008, %eax
357 /* Get the initial APIC ID. */
362 /* Get the nb cfg bit 54. */
363 movl $0xc001001f, %ecx /* NB_CFG_MSR */
365 movl %edi, %ecx /* CoreID bits */
371 /* Calculate stack pointer. */
372 movl $CacheSizeAPStack, %eax
374 movl $(CacheBase + (CacheSize - GlobalVarSize) / 2), %esp
377 /* Retrive init detected. */
388 restore_bist_result()
390 /* We need to set EBP? No need. */
392 pushl %ebx /* Init detected. */
393 pushl %eax /* BIST */
394 call cache_as_ram_main
395 /* We will not go back. */
397 post_code(0xaf) /* Should never see this POST code. */
400 /* fixed MTRR MSRs */
401 .long MTRRfix64K_00000_MSR
402 .long MTRRfix16K_80000_MSR
403 .long MTRRfix16K_A0000_MSR
404 .long MTRRfix4K_C0000_MSR
405 .long MTRRfix4K_C8000_MSR
406 .long MTRRfix4K_D0000_MSR
407 .long MTRRfix4K_D8000_MSR
408 .long MTRRfix4K_E0000_MSR
409 .long MTRRfix4K_E8000_MSR
410 .long MTRRfix4K_F0000_MSR
411 .long MTRRfix4K_F8000_MSR
414 .long MTRRphysBase_MSR(0)
415 .long MTRRphysMask_MSR(0)
416 .long MTRRphysBase_MSR(1)
417 .long MTRRphysMask_MSR(1)
418 .long MTRRphysBase_MSR(2)
419 .long MTRRphysMask_MSR(2)
420 .long MTRRphysBase_MSR(3)
421 .long MTRRphysMask_MSR(3)
422 .long MTRRphysBase_MSR(4)
423 .long MTRRphysMask_MSR(4)
424 .long MTRRphysBase_MSR(5)
425 .long MTRRphysMask_MSR(5)
426 .long MTRRphysBase_MSR(6)
427 .long MTRRphysMask_MSR(6)
428 .long MTRRphysBase_MSR(7)
429 .long MTRRphysMask_MSR(7)
431 /* Variable IORR MTRR MSRs */
432 .long IORRBase_MSR(0)
433 .long IORRMask_MSR(0)
434 .long IORRBase_MSR(1)
435 .long IORRMask_MSR(1)
437 /* Top of memory MTRR MSRs */
441 .long 0x000 /* NULL, end of table */
443 cache_as_ram_setup_out: