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powerpc: rename SPRN_HID2 define to SPRN_HID2_750FX 

JIRA: https://issues.redhat.com/browse/RHEL-83803

commit ad679719d7020a200c4a10248ebb3bbb374d423d
Author: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Date: Wed, 08 May 2024 00:25:00 +0000

This register number is hardware-specific, rename it for clarity.

FIXME comments are added in a few places where it seems like the wrong
register is used. As I can't test this, only the rename is done with no
functional change.

Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240124105031.45734-1-matthias.schiffer@ew.tq-group.com
Signed-off-by: Mark Langsdorf <mlangsdo@redhat.com>
This commit is contained in:
Mark Langsdorf 2025-03-17 08:00:59 -05:00
parent bea7991d2e
commit 4b44baefc3
6 changed files with 17 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/powerpc/include/asm/reg.h
View File

@ -618,7 +618,7 @@
#define HID1_ABE (1<<10) /* 7450 Address Broadcast Enable */
#define HID1_PS (1<<16) /* 750FX PLL selection */
#endif
#define SPRN_HID2 0x3F8 /* Hardware Implementation Register 2 */
#define SPRN_HID2_750FX 0x3F8 /* IBM 750FX HID2 Register */
#define SPRN_HID2_GEKKO 0x398 /* Gekko HID2 Register */
#define SPRN_IABR 0x3F2 /* Instruction Address Breakpoint Register */
#define SPRN_IABR2 0x3FA /* 83xx */

4
arch/powerpc/kernel/cpu_setup_6xx.S
View File

@ -372,7 +372,7 @@ _GLOBAL(__save_cpu_setup)
andi. r3,r3,0xff00
cmpwi cr0,r3,0x0200
bne 1f
mfspr r4,SPRN_HID2
mfspr r4,SPRN_HID2_750FX
stw r4,CS_HID2(r5)
1:
mtcr r7
@ -467,7 +467,7 @@ _GLOBAL(__restore_cpu_setup)
bne 4f
lwz r4,CS_HID2(r5)
rlwinm r4,r4,0,19,17
mtspr SPRN_HID2,r4
mtspr SPRN_HID2_750FX,r4
sync
4:
lwz r4,CS_HID1(r5)

4
arch/powerpc/kvm/book3s_emulate.c
View File

@ -714,7 +714,7 @@ int kvmppc_core_emulate_mtspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
case SPRN_HID1:
to_book3s(vcpu)->hid[1] = spr_val;
break;
case SPRN_HID2:
case SPRN_HID2_750FX:
to_book3s(vcpu)->hid[2] = spr_val;
break;
case SPRN_HID2_GEKKO:
@ -900,7 +900,7 @@ int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val
case SPRN_HID1:
*spr_val = to_book3s(vcpu)->hid[1];
break;
case SPRN_HID2:
case SPRN_HID2_750FX:
case SPRN_HID2_GEKKO:
*spr_val = to_book3s(vcpu)->hid[2];
break;

6
arch/powerpc/platforms/52xx/lite5200_sleep.S
View File

@ -199,7 +199,8 @@ lite5200_wakeup:
/* HIDs, MSR */
LOAD_SPRN(HID1, 0x19)
LOAD_SPRN(HID2, 0x1a)
/* FIXME: Should this use HID2_G2_LE? */
LOAD_SPRN(HID2_750FX, 0x1a)
/* address translation is tricky (see turn_on_mmu) */
@ -279,7 +280,8 @@ save_regs:
SAVE_SPRN(HID0, 0x18)
SAVE_SPRN(HID1, 0x19)
SAVE_SPRN(HID2, 0x1a)
/* FIXME: Should this use HID2_G2_LE? */
SAVE_SPRN(HID2_750FX, 0x1a)
mfmsr r10
stw r10, (4*0x1b)(r4)
/*SAVE_SPRN(LR, 0x1c) have to save it before the call */

6
arch/powerpc/platforms/83xx/suspend-asm.S
View File

@ -68,7 +68,8 @@ _GLOBAL(mpc83xx_enter_deep_sleep)
mfspr r5, SPRN_HID0
mfspr r6, SPRN_HID1
mfspr r7, SPRN_HID2
/* FIXME: Should this use SPRN_HID2_G2_LE? */
mfspr r7, SPRN_HID2_750FX
stw r5, SS_HID+0(r3)
stw r6, SS_HID+4(r3)
@ -396,7 +397,8 @@ mpc83xx_deep_resume:
mtspr SPRN_HID0, r5
mtspr SPRN_HID1, r6
mtspr SPRN_HID2, r7
/* FIXME: Should this use SPRN_HID2_G2_LE? */
mtspr SPRN_HID2_750FX, r7
lwz r4, SS_IABR+0(r3)
lwz r5, SS_IABR+4(r3)

8
drivers/cpufreq/pmac32-cpufreq.c
View File

@ -120,9 +120,9 @@ static int cpu_750fx_cpu_speed(int low_speed)
/* tweak L2 for high voltage */
if (has_cpu_l2lve) {
hid2 = mfspr(SPRN_HID2);
hid2 = mfspr(SPRN_HID2_750FX);
hid2 &= ~0x2000;
mtspr(SPRN_HID2, hid2);
mtspr(SPRN_HID2_750FX, hid2);
}
}
#ifdef CONFIG_PPC_BOOK3S_32
@ -131,9 +131,9 @@ static int cpu_750fx_cpu_speed(int low_speed)
if (low_speed == 1) {
/* tweak L2 for low voltage */
if (has_cpu_l2lve) {
hid2 = mfspr(SPRN_HID2);
hid2 = mfspr(SPRN_HID2_750FX);
hid2 |= 0x2000;
mtspr(SPRN_HID2, hid2);
mtspr(SPRN_HID2_750FX, hid2);
}
/* ramping down, set voltage last */