2 * Copyright 2008-2012 Freescale Semiconductor, Inc.
3 * Kumar Gala <kumar.gala@freescale.com>
5 * SPDX-License-Identifier: GPL-2.0+
8 #include <asm-offsets.h>
12 #include <ppc_asm.tmpl>
15 #include <asm/cache.h>
18 /* To boot secondary cpus, we need a place for them to start up.
19 * Normally, they start at 0xfffffffc, but that's usually the
20 * firmware, and we don't want to have to run the firmware again.
21 * Instead, the primary cpu will set the BPTR to point here to
22 * this page. We then set up the core, and head to
23 * start_secondary. Note that this means that the code below
24 * must never exceed 1023 instructions (the branch at the end
25 * would then be the 1024th).
27 .globl __secondary_start_page
29 __secondary_start_page:
30 /* First do some preliminary setup */
31 lis r3, HID0_EMCP@h /* enable machine check */
33 ori r3,r3,HID0_TBEN@l /* enable Timebase */
35 #ifdef CONFIG_PHYS_64BIT
36 ori r3,r3,HID0_ENMAS7@l /* enable MAS7 updates */
41 li r3,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */
44 cmpwi r0,0x50@l /* if we are rev 5.0 or greater set MBDD */
46 /* Set MBDD bit also */
47 ori r3, r3, HID1_MBDD@l
52 #ifdef CONFIG_SYS_FSL_ERRATUM_CPU_A003999
58 #ifdef CONFIG_SYS_FSL_ERRATUM_A004510
61 li r4,CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV
65 #ifdef CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2
66 li r4,CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2
71 /* Not a supported revision affected by erratum */
74 1: /* Erratum says set bits 55:60 to 001001 */
85 /* Enable branch prediction */
87 ori r3,r3,BUCSR_ENABLE@l
95 /* Enable/invalidate the I-Cache */
96 lis r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@h
97 ori r2,r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@l
104 lis r3,(L1CSR1_CPE|L1CSR1_ICE)@h
105 ori r3,r3,(L1CSR1_CPE|L1CSR1_ICE)@l
110 andi. r1,r3,L1CSR1_ICE@l
113 /* Enable/invalidate the D-Cache */
114 lis r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@h
115 ori r2,r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@l
122 lis r3,(L1CSR0_CPE|L1CSR0_DCE)@h
123 ori r3,r3,(L1CSR0_CPE|L1CSR0_DCE)@l
128 andi. r1,r3,L1CSR0_DCE@l
131 #define toreset(x) (x - __secondary_start_page + 0xfffff000)
133 /* get our PIR to figure out our table entry */
134 lis r3,toreset(__spin_table_addr)@h
135 ori r3,r3,toreset(__spin_table_addr)@l
139 #ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
141 * PIR definition for Chassis 2
142 * 0-17 Reserved (logic 0s)
143 * 18-19 CHIP_ID, 2'b00 - SoC 1
144 * all others - reserved
145 * 20-24 CLUSTER_ID 5'b00000 - CCM 1
146 * all others - reserved
147 * 25-26 CORE_CLUSTER_ID 2'b00 - cluster 1
151 * 27-28 CORE_ID 2'b00 - core 0
155 * 29-31 THREAD_ID 3'b000 - thread 0
158 * Power-on PIR increments threads by 0x01, cores within a cluster by 0x08
159 * and clusters by 0x20.
161 * We renumber PIR so that all threads in the system are consecutive.
164 rlwinm r8,r0,29,0x03 /* r8 = core within cluster */
165 srwi r10,r0,5 /* r10 = cluster */
167 mulli r5,r10,CONFIG_SYS_FSL_CORES_PER_CLUSTER
168 add r5,r5,r8 /* for spin table index */
169 mulli r4,r5,CONFIG_SYS_FSL_THREADS_PER_CORE /* for PIR */
170 #elif defined(CONFIG_E500MC)
171 rlwinm r4,r0,27,27,31
179 * r10 has the base address for the entry.
180 * we cannot access it yet before setting up a new TLB
182 slwi r8,r5,6 /* spin table is padded to 64 byte */
185 mtspr SPRN_PIR,r4 /* write to PIR register */
187 #ifdef CONFIG_SYS_CACHE_STASHING
188 /* set stash id to (coreID) * 2 + 32 + L1 CT (0) */
194 #if defined(CONFIG_SYS_P4080_ERRATUM_CPU22) || \
195 defined(CONFIG_SYS_FSL_ERRATUM_NMG_CPU_A011)
197 * CPU22 applies to P4080 rev 1.0, 2.0, fixed in 3.0
198 * NMG_CPU_A011 applies to P4080 rev 1.0, 2.0, fixed in 3.0
199 * also appleis to P3041 rev 1.0, 1.1, P2041 rev 1.0, 1.1
202 rlwinm r6,r3,24,~0x800 /* clear E bit */
205 ori r5,r5,SVR_P4080@l
214 #ifdef CONFIG_SYS_FSL_ERRATUM_NMG_CPU_A011
215 lis r3,toreset(enable_cpu_a011_workaround)@ha
216 lwz r3,toreset(enable_cpu_a011_workaround)@l(r3)
221 oris r3,r3,(L1CSR2_DCWS)@h
226 #ifdef CONFIG_SYS_FSL_ERRATUM_A005812
228 * A-005812 workaround sets bit 32 of SPR 976 for SoCs running in
229 * write shadow mode. This code should run after other code setting
233 andis. r3,r3,(L1CSR2_DCWS)@h
235 mfspr r3, SPRN_HDBCR0
237 mtspr SPRN_HDBCR0, r3
241 #ifdef CONFIG_BACKSIDE_L2_CACHE
242 /* skip L2 setup on P2040/P2040E as they have no L2 */
244 rlwinm r6,r3,24,~0x800 /* clear E bit of SVR */
247 ori r3,r3,SVR_P2040@l
251 /* Enable/invalidate the L2 cache */
253 lis r2,(L2CSR0_L2FI|L2CSR0_L2LFC)@h
254 ori r2,r2,(L2CSR0_L2FI|L2CSR0_L2LFC)@l
261 #ifdef CONFIG_SYS_CACHE_STASHING
262 /* set stash id to (coreID) * 2 + 32 + L2 (1) */
267 lis r3,CONFIG_SYS_INIT_L2CSR0@h
268 ori r3,r3,CONFIG_SYS_INIT_L2CSR0@l
273 andis. r1,r3,L2CSR0_L2E@h
277 /* setup mapping for the spin table, WIMGE=0b00100 */
278 lis r13,toreset(__spin_table_addr)@h
279 ori r13,r13,toreset(__spin_table_addr)@l
282 rlwinm r13,r13,0,0,19
284 lis r11,(MAS0_TLBSEL(1)|MAS0_ESEL(1))@h
286 lis r11,(MAS1_VALID|MAS1_IPROT)@h
287 ori r11,r11,(MAS1_TS|MAS1_TSIZE(BOOKE_PAGESZ_4K))@l
289 oris r11,r13,(MAS2_M|MAS2_G)@h
290 ori r11,r13,(MAS2_M|MAS2_G)@l
292 oris r11,r13,(MAS3_SX|MAS3_SW|MAS3_SR)@h
293 ori r11,r13,(MAS3_SX|MAS3_SW|MAS3_SR)@l
300 * __bootpg_addr has the address of __second_half_boot_page
301 * jump there in AS=1 space with cache enabled
303 lis r13,toreset(__bootpg_addr)@h
304 ori r13,r13,toreset(__bootpg_addr)@l
308 ori r12,r13,MSR_IS|MSR_DS@l
313 * Allocate some space for the SDRAM address of the bootpg.
314 * This variable has to be in the boot page so that it can
315 * be accessed by secondary cores when they come out of reset.
317 .align L1_CACHE_SHIFT
322 .global __spin_table_addr
327 * This variable is set by cpu_init_r() after parsing hwconfig
328 * to enable workaround for erratum NMG_CPU_A011.
330 .align L1_CACHE_SHIFT
331 .global enable_cpu_a011_workaround
332 enable_cpu_a011_workaround:
335 /* Fill in the empty space. The actual reset vector is
336 * the last word of the page */
337 __secondary_start_code_end:
338 .space 4092 - (__secondary_start_code_end - __secondary_start_page)
339 __secondary_reset_vector:
340 b __secondary_start_page
343 /* this is a separated page for the spin table and cacheable boot code */
344 .align L1_CACHE_SHIFT
345 .global __second_half_boot_page
346 __second_half_boot_page:
347 #ifdef CONFIG_PPC_SPINTABLE_COMPATIBLE
348 lis r3,(spin_table_compat - __second_half_boot_page)@h
349 ori r3,r3,(spin_table_compat - __second_half_boot_page)@l
350 add r3,r3,r11 /* r11 has the address of __second_half_boot_page */
354 #define ENTRY_ADDR_UPPER 0
355 #define ENTRY_ADDR_LOWER 4
356 #define ENTRY_R3_UPPER 8
357 #define ENTRY_R3_LOWER 12
358 #define ENTRY_RESV 16
360 #define ENTRY_SIZE 64
363 * r10 has the base address of the spin table.
364 * spin table is defined as
366 * uint64_t entry_addr;
371 * we pad this struct to 64 bytes so each entry is in its own cacheline
376 stw r3,ENTRY_ADDR_UPPER(r10)
377 stw r3,ENTRY_R3_UPPER(r10)
378 stw r4,ENTRY_R3_LOWER(r10)
379 stw r3,ENTRY_RESV(r10)
380 stw r4,ENTRY_PIR(r10)
382 stw r8,ENTRY_ADDR_LOWER(r10)
384 /* spin waiting for addr */
387 * To comply with ePAPR 1.1, the spin table has been moved to cache-enabled
388 * memory. Old OS may not work with this change. A patch is waiting to be
389 * accepted for Linux kernel. Other OS needs similar fix to spin table.
390 * For OSes with old spin table code, we can enable this temporary fix by
391 * setting environmental variable "spin_table_compat". For new OSes, set
392 * "spin_table_compat=no". After Linux is fixed, we can remove this macro
393 * and related code. For now, it is enabled by default.
395 #ifdef CONFIG_PPC_SPINTABLE_COMPATIBLE
402 lwz r4,ENTRY_ADDR_LOWER(r10)
407 /* get the upper bits of the addr */
408 lwz r11,ENTRY_ADDR_UPPER(r10)
410 /* setup branch addr */
413 /* mark the entry as released */
415 stw r8,ENTRY_ADDR_LOWER(r10)
417 /* mask by ~64M to setup our tlb we will jump to */
421 * setup r3, r4, r5, r6, r7, r8, r9
422 * r3 contains the value to put in the r3 register at secondary cpu
423 * entry. The high 32-bits are ignored on 32-bit chip implementations.
424 * 64-bit chip implementations however shall load all 64-bits
426 #ifdef CONFIG_SYS_PPC64
427 ld r3,ENTRY_R3_UPPER(r10)
429 lwz r3,ENTRY_R3_LOWER(r10)
434 lis r7,(64*1024*1024)@h
438 /* load up the pir */
439 lwz r0,ENTRY_PIR(r10)
442 stw r0,ENTRY_PIR(r10)
446 * Coming here, we know the cpu has one TLB mapping in TLB1[0]
447 * which maps 0xfffff000-0xffffffff one-to-one. We set up a
448 * second mapping that maps addr 1:1 for 64M, and then we jump to
451 lis r10,(MAS0_TLBSEL(1)|MAS0_ESEL(0))@h
453 lis r10,(MAS1_VALID|MAS1_IPROT)@h
454 ori r10,r10,(MAS1_TSIZE(BOOKE_PAGESZ_64M))@l
456 /* WIMGE = 0b00000 for now */
458 ori r12,r12,(MAS3_SX|MAS3_SW|MAS3_SR)
460 #ifdef CONFIG_ENABLE_36BIT_PHYS
465 /* Now we have another mapping for this page, so we jump to that
475 .space CONFIG_MAX_CPUS*ENTRY_SIZE
477 #ifdef CONFIG_PPC_SPINTABLE_COMPATIBLE
478 .align L1_CACHE_SHIFT
479 .global spin_table_compat
486 .space 4096 - (__spin_table_end - __spin_table)