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MIPS: Always read full 64 bit CM error GCRs for CM3

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CM3 has 64 bit GCR_ERROR_* registers, but the code in
mips_cm_error_report was previously only reading 32 bits of it in MIPS32
kernels. Fix by splitting the reads for CM2 & CM3, and making use of the
read64_ variants of the accessor function for CM3.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Patchwork: https://patchwork.linux-mips.org/patch/11189/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton 2015-09-22 10:26:41 -07:00 committed by Ralf Baechle
parent b657a62866
commit 47b26a467d
2 changed files with 40 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/mips/include/asm/mips-cm.h
View File

@ -11,6 +11,7 @@
#ifndef __MIPS_ASM_MIPS_CM_H__
#define __MIPS_ASM_MIPS_CM_H__
#include <linux/bitops.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/types.h>
@ -263,6 +264,8 @@ BUILD_CM_Cx_R_(tcid_8_priority, 0x80)
/* GCR_ERROR_CAUSE register fields */
#define CM_GCR_ERROR_CAUSE_ERRTYPE_SHF 27
#define CM_GCR_ERROR_CAUSE_ERRTYPE_MSK (_ULCAST_(0x1f) << 27)
#define CM3_GCR_ERROR_CAUSE_ERRTYPE_SHF 58
#define CM3_GCR_ERROR_CAUSE_ERRTYPE_MSK GENMASK_ULL(63, 58)
#define CM_GCR_ERROR_CAUSE_ERRINFO_SHF 0
#define CM_GCR_ERROR_CAUSE_ERRINGO_MSK (_ULCAST_(0x7ffffff) << 0)

72
arch/mips/kernel/mips-cm.c
View File

@ -252,36 +252,26 @@ int mips_cm_probe(void)
void mips_cm_error_report(void)
{
/*
* CM3 has a 64-bit Error cause register with 0:57 containing the error
* info and 63:58 the error type. For old CMs, everything is contained
* in a single 32-bit register (0:26 and 31:27 respectively). Even
* though the cm_error is u64, we will simply ignore the upper word
* for CM2.
*/
u64 cm_error;
unsigned long revision, cm_addr, cm_other;
int ocause, cause, cm_error_cause_sft;
u64 cm_error, cm_addr, cm_other;
unsigned long revision;
int ocause, cause;
char buf[256];
if (!mips_cm_present())
return;
revision = mips_cm_revision();
cm_error = read_gcr_error_cause();
cm_addr = read_gcr_error_addr();
cm_other = read_gcr_error_mult();
cm_error_cause_sft = CM_GCR_ERROR_CAUSE_ERRTYPE_SHF +
((revision >= CM_REV_CM3) ? 31 : 0);
cause = cm_error >> cm_error_cause_sft;
if (!cause)
/* All good */
return;
ocause = cm_other >> CM_GCR_ERROR_MULT_ERR2ND_SHF;
if (revision < CM_REV_CM3) { /* CM2 */
cm_error = read_gcr_error_cause();
cm_addr = read_gcr_error_addr();
cm_other = read_gcr_error_mult();
cause = cm_error >> CM_GCR_ERROR_CAUSE_ERRTYPE_SHF;
ocause = cm_other >> CM_GCR_ERROR_MULT_ERR2ND_SHF;
if (!cause)
return;
if (cause < 16) {
unsigned long cca_bits = (cm_error >> 15) & 7;
unsigned long tr_bits = (cm_error >> 12) & 7;
@ -313,18 +303,30 @@ void mips_cm_error_report(void)
}
pr_err("CM_ERROR=%08llx %s <%s>\n", cm_error,
cm2_causes[cause], buf);
pr_err("CM_ADDR =%08lx\n", cm_addr);
pr_err("CM_OTHER=%08lx %s\n", cm_other, cm2_causes[ocause]);
pr_err("CM_ADDR =%08llx\n", cm_addr);
pr_err("CM_OTHER=%08llx %s\n", cm_other, cm2_causes[ocause]);
} else { /* CM3 */
/* Used by cause == {1,2,3} */
unsigned long core_id_bits = (cm_error >> 22) & 0xf;
unsigned long vp_id_bits = (cm_error >> 18) & 0xf;
unsigned long cmd_bits = (cm_error >> 14) & 0xf;
unsigned long cmd_group_bits = (cm_error >> 11) & 0xf;
unsigned long cm3_cca_bits = (cm_error >> 8) & 7;
unsigned long mcp_bits = (cm_error >> 5) & 0xf;
unsigned long cm3_tr_bits = (cm_error >> 1) & 0xf;
unsigned long sched_bit = cm_error & 0x1;
ulong core_id_bits, vp_id_bits, cmd_bits, cmd_group_bits;
ulong cm3_cca_bits, mcp_bits, cm3_tr_bits, sched_bit;
cm_error = read64_gcr_error_cause();
cm_addr = read64_gcr_error_addr();
cm_other = read64_gcr_error_mult();
cause = cm_error >> CM3_GCR_ERROR_CAUSE_ERRTYPE_SHF;
ocause = cm_other >> CM_GCR_ERROR_MULT_ERR2ND_SHF;
if (!cause)
return;
/* Used by cause == {1,2,3} */
core_id_bits = (cm_error >> 22) & 0xf;
vp_id_bits = (cm_error >> 18) & 0xf;
cmd_bits = (cm_error >> 14) & 0xf;
cmd_group_bits = (cm_error >> 11) & 0xf;
cm3_cca_bits = (cm_error >> 8) & 7;
mcp_bits = (cm_error >> 5) & 0xf;
cm3_tr_bits = (cm_error >> 1) & 0xf;
sched_bit = cm_error & 0x1;
if (cause == 1 || cause == 3) { /* Tag ECC */
unsigned long tag_ecc = (cm_error >> 57) & 0x1;
@ -372,8 +374,8 @@ void mips_cm_error_report(void)
pr_err("CM_ERROR=%llx %s <%s>\n", cm_error,
cm3_causes[cause], buf);
pr_err("CM_ADDR =%lx\n", cm_addr);
pr_err("CM_OTHER=%lx %s\n", cm_other, cm3_causes[ocause]);
pr_err("CM_ADDR =%llx\n", cm_addr);
pr_err("CM_OTHER=%llx %s\n", cm_other, cm3_causes[ocause]);
}
/* reprime cause register */