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powerpc/32s: use CONFIG_PPC_BOOK3S_601 instead of reading PVR

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Use CONFIG_PPC_BOOK3S_601 instead of reading PVR to know if
it is a 601 or not.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/909c26db9facd7fe454695b303f952e019dd9eda.1566834712.git.christophe.leroy@c-s.fr
This commit is contained in:
Christophe Leroy 2019-08-26 15:52:17 +00:00 committed by Michael Ellerman
parent 88fb309409
commit 39097b9c6d
2 changed files with 24 additions and 31 deletions
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49
arch/powerpc/kernel/head_32.S
View File

@ -34,7 +34,16 @@
#include "head_32.h"
/* 601 only have IBAT; cr0.eq is set on 601 when using this macro */
/* 601 only have IBAT */
#ifdef CONFIG_PPC_BOOK3S_601
#define LOAD_BAT(n, reg, RA, RB) \
li RA,0; \
mtspr SPRN_IBAT##n##U,RA; \
lwz RA,(n*16)+0(reg); \
lwz RB,(n*16)+4(reg); \
mtspr SPRN_IBAT##n##U,RA; \
mtspr SPRN_IBAT##n##L,RB
#else
#define LOAD_BAT(n, reg, RA, RB) \
/* see the comment for clear_bats() -- Cort */ \
li RA,0; \
@ -44,12 +53,11 @@
lwz RB,(n*16)+4(reg); \
mtspr SPRN_IBAT##n##U,RA; \
mtspr SPRN_IBAT##n##L,RB; \
beq 1f; \
lwz RA,(n*16)+8(reg); \
lwz RB,(n*16)+12(reg); \
mtspr SPRN_DBAT##n##U,RA; \
mtspr SPRN_DBAT##n##L,RB; \
1:
mtspr SPRN_DBAT##n##L,RB
#endif
__HEAD
.stabs "arch/powerpc/kernel/",N_SO,0,0,0f
@ -820,9 +828,6 @@ load_up_mmu:
/* Load the BAT registers with the values set up by MMU_init.
MMU_init takes care of whether we're on a 601 or not. */
mfpvr r3
srwi r3,r3,16
cmpwi r3,1
lis r3,BATS@ha
addi r3,r3,BATS@l
tophys(r3,r3)
@ -998,11 +1003,8 @@ EXPORT_SYMBOL(switch_mmu_context)
*/
clear_bats:
li r10,0
mfspr r9,SPRN_PVR
rlwinm r9,r9,16,16,31 /* r9 = 1 for 601, 4 for 604 */
cmpwi r9, 1
beq 1f
#ifndef CONFIG_PPC_BOOK3S_601
mtspr SPRN_DBAT0U,r10
mtspr SPRN_DBAT0L,r10
mtspr SPRN_DBAT1U,r10
@ -1011,7 +1013,7 @@ clear_bats:
mtspr SPRN_DBAT2L,r10
mtspr SPRN_DBAT3U,r10
mtspr SPRN_DBAT3L,r10
1:
#endif
mtspr SPRN_IBAT0U,r10
mtspr SPRN_IBAT0L,r10
mtspr SPRN_IBAT1U,r10
@ -1106,10 +1108,7 @@ mmu_off:
*/
initial_bats:
lis r11,PAGE_OFFSET@h
mfspr r9,SPRN_PVR
rlwinm r9,r9,16,16,31 /* r9 = 1 for 601, 4 for 604 */
cmpwi 0,r9,1
bne 4f
#ifdef CONFIG_PPC_BOOK3S_601
ori r11,r11,4 /* set up BAT registers for 601 */
li r8,0x7f /* valid, block length = 8MB */
mtspr SPRN_IBAT0U,r11 /* N.B. 601 has valid bit in */
@ -1122,10 +1121,8 @@ initial_bats:
addis r8,r8,0x800000@h
mtspr SPRN_IBAT2U,r11
mtspr SPRN_IBAT2L,r8
isync
blr
4: tophys(r8,r11)
#else
tophys(r8,r11)
#ifdef CONFIG_SMP
ori r8,r8,0x12 /* R/W access, M=1 */
#else
@ -1137,10 +1134,10 @@ initial_bats:
mtspr SPRN_DBAT0U,r11 /* bit in upper BAT register */
mtspr SPRN_IBAT0L,r8
mtspr SPRN_IBAT0U,r11
#endif
isync
blr
#ifdef CONFIG_BOOTX_TEXT
setup_disp_bat:
/*
@ -1155,15 +1152,13 @@ setup_disp_bat:
beqlr
lwz r11,0(r8)
lwz r8,4(r8)
mfspr r9,SPRN_PVR
rlwinm r9,r9,16,16,31 /* r9 = 1 for 601, 4 for 604 */
cmpwi 0,r9,1
beq 1f
#ifndef CONFIG_PPC_BOOK3S_601
mtspr SPRN_DBAT3L,r8
mtspr SPRN_DBAT3U,r11
blr
1: mtspr SPRN_IBAT3L,r8
#else
mtspr SPRN_IBAT3L,r8
mtspr SPRN_IBAT3U,r11
#endif
blr
#endif /* CONFIG_BOOTX_TEXT */

6
arch/powerpc/kernel/misc_32.S
View File

@ -303,11 +303,9 @@ END_FTR_SECTION_IFSET(CPU_FTR_UNIFIED_ID_CACHE)
mfspr r3,SPRN_L1CSR1
ori r3,r3,L1CSR1_ICFI|L1CSR1_ICLFR
mtspr SPRN_L1CSR1,r3
#elif defined(CONFIG_PPC_BOOK3S_601)
blr /* for 601, do nothing */
#else
mfspr r3,SPRN_PVR
rlwinm r3,r3,16,16,31
cmpwi 0,r3,1
beqlr /* for 601, do nothing */
/* 603/604 processor - use invalidate-all bit in HID0 */
mfspr r3,SPRN_HID0
ori r3,r3,HID0_ICFI