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authorDavid Daney <david.daney@cavium.com>2015-01-15 16:11:15 +0300
committerRalf Baechle <ralf@linux-mips.org>2015-02-20 17:31:59 +0300
commit726da2f82a1659da5d4d3473427fdb198ffde370 (patch)
tree733b56095f351b340585ab23779a76310dd0e292
parentdebe6a623d3cdc7f0374124830587fb8d1a04b63 (diff)
downloadlinux-726da2f82a1659da5d4d3473427fdb198ffde370.tar.xz
MIPS: OCTEON: Core-15169 Workaround and general CVMSEG cleanup.
Signed-off-by: David Daney <david.daney@cavium.com> Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/8943/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
-rw-r--r--arch/mips/cavium-octeon/setup.c4
-rw-r--r--arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h19
2 files changed, 17 insertions, 6 deletions
diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c
index 8d2b82327a72..8b6b72a3e3c4 100644
--- a/arch/mips/cavium-octeon/setup.c
+++ b/arch/mips/cavium-octeon/setup.c
@@ -579,12 +579,10 @@ void octeon_user_io_init(void)
/* R/W If set, CVMSEG is available for loads/stores in user
* mode. */
cvmmemctl.s.cvmsegenau = 0;
- /* R/W Size of local memory in cache blocks, 54 (6912 bytes)
- * is max legal value. */
- cvmmemctl.s.lmemsz = CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE;
write_c0_cvmmemctl(cvmmemctl.u64);
+ /* Setup of CVMSEG is done in kernel-entry-init.h */
if (smp_processor_id() == 0)
pr_notice("CVMSEG size: %d cache lines (%d bytes)\n",
CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE,
diff --git a/arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h b/arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h
index 21732c306635..c7ce0811657d 100644
--- a/arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h
+++ b/arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h
@@ -8,11 +8,10 @@
#ifndef __ASM_MACH_CAVIUM_OCTEON_KERNEL_ENTRY_H
#define __ASM_MACH_CAVIUM_OCTEON_KERNEL_ENTRY_H
-
-#define CP0_CYCLE_COUNTER $9, 6
#define CP0_CVMCTL_REG $9, 7
#define CP0_CVMMEMCTL_REG $11,7
#define CP0_PRID_REG $15, 0
+#define CP0_DCACHE_ERR_REG $27, 1
#define CP0_PRID_OCTEON_PASS1 0x000d0000
#define CP0_PRID_OCTEON_CN30XX 0x000d0200
@@ -60,7 +59,7 @@
skip:
# First clear off CvmCtl[IPPCI] bit and move the performance
# counters interrupt to IRQ 6
- li v1, ~(7 << 7)
+ dli v1, ~(7 << 7)
and v0, v0, v1
ori v0, v0, (6 << 7)
@@ -90,6 +89,20 @@ skip:
sync
# Flush dcache after config change
cache 9, 0($0)
+ # Zero all of CVMSEG to make sure parity is correct
+ dli v0, CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE
+ dsll v0, 7
+ beqz v0, 2f
+1: dsubu v0, 8
+ sd $0, -32768(v0)
+ bnez v0, 1b
+2:
+ mfc0 v0, CP0_PRID_REG
+ bbit0 v0, 15, 1f
+ # OCTEON II or better have bit 15 set. Clear the error bits.
+ dli v0, 0x27
+ dmtc0 v0, CP0_DCACHE_ERR_REG
+1:
# Get my core id
rdhwr v0, $0
# Jump the master to kernel_entry