1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * This file contains low level CPU setup functions.
4 * Kumar Gala <galak@kernel.crashing.org>
5 * Copyright 2009 Freescale Semiconductor, Inc.
7 * Based on cpu_setup_6xx code by
8 * Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 #include <asm/processor.h>
13 #include <asm/cputable.h>
14 #include <asm/ppc_asm.h>
15 #include <asm/nohash/mmu-book3e.h>
16 #include <asm/asm-offsets.h>
17 #include <asm/mpc85xx.h>
19 _GLOBAL(__e500_icache_setup)
21 andi. r3, r0, L1CSR1_ICE
22 bnelr /* Already enabled */
23 oris r0, r0, L1CSR1_CPE@h
24 ori r0, r0, (L1CSR1_ICFI | L1CSR1_ICLFR | L1CSR1_ICE)
25 mtspr SPRN_L1CSR1, r0 /* Enable I-Cache */
29 _GLOBAL(__e500_dcache_setup)
31 andi. r3, r0, L1CSR0_DCE
32 bnelr /* Already enabled */
36 mtspr SPRN_L1CSR0, r0 /* Disable */
39 li r0, (L1CSR0_DCFI | L1CSR0_CLFC)
40 mtspr SPRN_L1CSR0, r0 /* Invalidate */
42 1: mfspr r0, SPRN_L1CSR0
43 andi. r3, r0, L1CSR0_CLFC
44 bne+ 1b /* Wait for lock bits reset */
45 oris r0, r0, L1CSR0_CPE@h
46 ori r0, r0, L1CSR0_DCE
49 mtspr SPRN_L1CSR0, r0 /* Enable */
54 * FIXME - we haven't yet done testing to determine a reasonable default
55 * value for PW20_WAIT_IDLE_BIT.
57 #define PW20_WAIT_IDLE_BIT 50 /* 1ms, TB frequency is 41.66MHZ */
58 _GLOBAL(setup_pw20_idle)
59 mfspr r3, SPRN_PWRMGTCR0
61 /* Set PW20_WAIT bit, enable pw20 state*/
62 ori r3, r3, PWRMGTCR0_PW20_WAIT
63 li r11, PW20_WAIT_IDLE_BIT
65 /* Set Automatic PW20 Core Idle Count */
66 rlwimi r3, r11, PWRMGTCR0_PW20_ENT_SHIFT, PWRMGTCR0_PW20_ENT
68 mtspr SPRN_PWRMGTCR0, r3
73 * FIXME - we haven't yet done testing to determine a reasonable default
74 * value for AV_WAIT_IDLE_BIT.
76 #define AV_WAIT_IDLE_BIT 50 /* 1ms, TB frequency is 41.66MHZ */
77 _GLOBAL(setup_altivec_idle)
78 mfspr r3, SPRN_PWRMGTCR0
80 /* Enable Altivec Idle */
81 oris r3, r3, PWRMGTCR0_AV_IDLE_PD_EN@h
82 li r11, AV_WAIT_IDLE_BIT
84 /* Set Automatic AltiVec Idle Count */
85 rlwimi r3, r11, PWRMGTCR0_AV_IDLE_CNT_SHIFT, PWRMGTCR0_AV_IDLE_CNT
87 mtspr SPRN_PWRMGTCR0, r3
91 #ifdef CONFIG_PPC_E500MC
92 _GLOBAL(__setup_cpu_e6500)
95 bl setup_altivec_ivors
96 /* Touch IVOR42 only if the CPU supports E.HV category */
98 rlwinm. r10,r10,0,MMUCFG_LPIDSIZE
104 bl setup_altivec_idle
108 #endif /* CONFIG_PPC_E500MC */
112 _GLOBAL(__setup_cpu_e200)
113 /* enable dedicated debug exception handling resources (Debug APU) */
115 ori r3,r3,HID0_DAPUEN@l
118 #endif /* CONFIG_E200 */
121 #ifndef CONFIG_PPC_E500MC
122 _GLOBAL(__setup_cpu_e500v1)
123 _GLOBAL(__setup_cpu_e500v2)
125 bl __e500_icache_setup
126 bl __e500_dcache_setup
127 bl __setup_e500_ivors
128 #if defined(CONFIG_FSL_RIO) || defined(CONFIG_FSL_PCI)
129 /* Ensure that RFXE is set */
131 oris r3,r3,HID1_RFXE@h
136 #else /* CONFIG_PPC_E500MC */
137 _GLOBAL(__setup_cpu_e500mc)
138 _GLOBAL(__setup_cpu_e5500)
140 bl __e500_icache_setup
141 bl __e500_dcache_setup
142 bl __setup_e500mc_ivors
144 * We only want to touch IVOR38-41 if we're running on hardware
145 * that supports category E.HV. The architectural way to determine
146 * this is MMUCFG[LPIDSIZE].
148 mfspr r3, SPRN_MMUCFG
149 rlwinm. r3, r3, 0, MMUCFG_LPIDSIZE
154 lwz r3, CPU_SPEC_FEATURES(r4)
155 /* We need this check as cpu_setup is also called for
156 * the secondary cores. So, if we have already cleared
157 * the feature on the primary core, avoid doing it on the
160 andi. r6, r3, CPU_FTR_EMB_HV
162 rlwinm r3, r3, 0, ~CPU_FTR_EMB_HV
163 stw r3, CPU_SPEC_FEATURES(r4)
167 #endif /* CONFIG_PPC_E500MC */
168 #endif /* CONFIG_E500 */
169 #endif /* CONFIG_PPC32 */
171 #ifdef CONFIG_PPC_BOOK3E_64
172 _GLOBAL(__restore_cpu_e6500)
174 bl setup_altivec_ivors
175 /* Touch IVOR42 only if the CPU supports E.HV category */
176 mfspr r10,SPRN_MMUCFG
177 rlwinm. r10,r10,0,MMUCFG_LPIDSIZE
182 bl setup_altivec_idle
183 bl __restore_cpu_e5500
187 _GLOBAL(__restore_cpu_e5500)
189 bl __e500_icache_setup
190 bl __e500_dcache_setup
191 bl __setup_base_ivors
192 bl setup_perfmon_ivor
193 bl setup_doorbell_ivors
195 * We only want to touch IVOR38-41 if we're running on hardware
196 * that supports category E.HV. The architectural way to determine
197 * this is MMUCFG[LPIDSIZE].
199 mfspr r10,SPRN_MMUCFG
200 rlwinm. r10,r10,0,MMUCFG_LPIDSIZE
207 _GLOBAL(__setup_cpu_e5500)
209 bl __e500_icache_setup
210 bl __e500_dcache_setup
211 bl __setup_base_ivors
212 bl setup_perfmon_ivor
213 bl setup_doorbell_ivors
215 * We only want to touch IVOR38-41 if we're running on hardware
216 * that supports category E.HV. The architectural way to determine
217 * this is MMUCFG[LPIDSIZE].
219 mfspr r10,SPRN_MMUCFG
220 rlwinm. r10,r10,0,MMUCFG_LPIDSIZE
225 ld r10,CPU_SPEC_FEATURES(r4)
226 LOAD_REG_IMMEDIATE(r9,CPU_FTR_EMB_HV)
228 std r10,CPU_SPEC_FEATURES(r4)
234 /* flush L1 data cache, it can apply to e500v2, e500mc and e5500 */
235 _GLOBAL(flush_dcache_L1)
240 rlwinm r5,r3,9,3 /* Extract cache block size */
241 twlgti r5,1 /* Only 32 and 64 byte cache blocks
242 * are currently defined.
245 subfic r6,r5,2 /* r6 = log2(1KiB / cache block size) -
246 * log2(number of ways)
248 slw r5,r4,r5 /* r5 = cache block size */
250 rlwinm r7,r3,0,0xff /* Extract number of KiB in the cache */
251 mulli r7,r7,13 /* An 8-way cache will require 13
256 /* save off HID0 and set DCFA */
258 ori r9,r8,HID0_DCFA@l
262 LOAD_REG_IMMEDIATE(r6, KERNELBASE)
266 1: lwz r3,0(r4) /* Load... */
274 1: dcbf 0,r4 /* ...and flush. */
287 /* skip L2 cache on P2040/P2040E as they have no L2 cache */
289 /* shift right by 8 bits and clear E bit of SVR */
290 rlwinm r4, r3, 24, ~0x800
293 ori r3, r3, SVR_P2040@l
303 /* flush backside L2 cache */
304 flush_backside_L2_cache:
311 /* Flush the L2 cache */
312 mfspr r3, SPRN_L2CSR0
313 ori r3, r3, L2CSR0_L2FL@l
319 /* check if it is complete */
320 1: mfspr r3,SPRN_L2CSR0
321 andi. r3, r3, L2CSR0_L2FL@l
326 _GLOBAL(cpu_down_flush_e500v2)
332 _GLOBAL(cpu_down_flush_e500mc)
333 _GLOBAL(cpu_down_flush_e5500)
336 bl flush_backside_L2_cache
340 /* L1 Data Cache of e6500 contains no modified data, no flush is required */
341 _GLOBAL(cpu_down_flush_e6500)