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authorSerge Semin <Sergey.Semin@baikalelectronics.ru>2020-05-21 17:07:18 +0300
committerThomas Bogendoerfer <tsbogend@alpha.franken.de>2020-05-22 09:12:22 +0200
commit999079c851b46fd945a8b074d115f9f08a056ca9 (patch)
treef3c406287fdd67df212108520864ce3fe0a29d0b
parent742318ad5eeecace49e95da5d3cf4571b0b26b36 (diff)
mips: Add CONFIG/CONFIG6/Cause reg fields macro
There are bit fields which persist in the MIPS CONFIG and CONFIG6 registers, but haven't been described in the generic mipsregs.h header so far. In particular, the generic CONFIG bitfields are BE - endian mode, BM - burst mode, SB - SimpleBE, OCP interface mode indicator, UDI - user-defined "CorExtend" instructions, DSP - data scratch pad RAM present, ISP - instruction scratch pad RAM present, etc. The core-specific CONFIG6 bitfields are JRCD - jump register cache prediction disable, R6 - MIPSr6 extensions enable, IFUPerfCtl - IFU performance control, SPCD - sleep state performance counter, DLSB - disable load/store bonding. A new exception code reported in the ExcCode field of the Cause register: 30 - Parity/ECC error exception happened on either fetch, load or cache refill. Lets add them to the mipsregs.h header to be used in future platform code, which have them utilized. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Paul Burton <paulburton@kernel.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Rob Herring <robh+dt@kernel.org> Cc: devicetree@vger.kernel.org Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
-rw-r--r--arch/mips/include/asm/mipsregs.h19
-rw-r--r--arch/mips/kernel/spram.c4
2 files changed, 21 insertions, 2 deletions
diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h
index a284da54efd5..fe6293f5b939 100644
--- a/arch/mips/include/asm/mipsregs.h
+++ b/arch/mips/include/asm/mipsregs.h
@@ -468,6 +468,7 @@
#define EXCCODE_THREAD 25 /* Thread exceptions (MT) */
#define EXCCODE_DSPDIS 26 /* DSP disabled exception */
#define EXCCODE_GE 27 /* Virtualized guest exception (VZ) */
+#define EXCCODE_CACHEERR 30 /* Parity/ECC occured on a core */
/* Implementation specific trap codes used by MIPS cores */
#define MIPS_EXCCODE_TLBPAR 16 /* TLB parity error exception */
@@ -563,9 +564,17 @@
#define MIPS_CONF_MT_FTLB (_ULCAST_(4) << 7)
#define MIPS_CONF_AR (_ULCAST_(7) << 10)
#define MIPS_CONF_AT (_ULCAST_(3) << 13)
+#define MIPS_CONF_BE (_ULCAST_(1) << 15)
+#define MIPS_CONF_BM (_ULCAST_(1) << 16)
#define MIPS_CONF_MM (_ULCAST_(3) << 17)
#define MIPS_CONF_MM_SYSAD (_ULCAST_(1) << 17)
#define MIPS_CONF_MM_FULL (_ULCAST_(2) << 17)
+#define MIPS_CONF_SB (_ULCAST_(1) << 21)
+#define MIPS_CONF_UDI (_ULCAST_(1) << 22)
+#define MIPS_CONF_DSP (_ULCAST_(1) << 23)
+#define MIPS_CONF_ISP (_ULCAST_(1) << 24)
+#define MIPS_CONF_KU (_ULCAST_(3) << 25)
+#define MIPS_CONF_K23 (_ULCAST_(3) << 28)
#define MIPS_CONF_M (_ULCAST_(1) << 31)
/*
@@ -677,9 +686,19 @@
#define MIPS_CONF5_CV (_ULCAST_(1) << 29)
#define MIPS_CONF5_K (_ULCAST_(1) << 30)
+/* Jump register cache prediction disable */
+#define MIPS_CONF6_JRCD (_ULCAST_(1) << 0)
+/* MIPSr6 extensions enable */
+#define MIPS_CONF6_R6 (_ULCAST_(1) << 2)
+/* IFU Performance Control */
+#define MIPS_CONF6_IFUPERFCTL (_ULCAST_(3) << 10)
#define MIPS_CONF6_SYND (_ULCAST_(1) << 13)
+/* Sleep state performance counter disable */
+#define MIPS_CONF6_SPCD (_ULCAST_(1) << 14)
/* proAptiv FTLB on/off bit */
#define MIPS_CONF6_FTLBEN (_ULCAST_(1) << 15)
+/* Disable load/store bonding */
+#define MIPS_CONF6_DLSB (_ULCAST_(1) << 21)
/* Loongson-3 FTLB on/off bit */
#define MIPS_CONF6_FTLBDIS (_ULCAST_(1) << 22)
/* FTLB probability bits */
diff --git a/arch/mips/kernel/spram.c b/arch/mips/kernel/spram.c
index 26d355462ace..d5d96214cce5 100644
--- a/arch/mips/kernel/spram.c
+++ b/arch/mips/kernel/spram.c
@@ -209,11 +209,11 @@ void spram_config(void)
case CPU_P6600:
config0 = read_c0_config();
/* FIXME: addresses are Malta specific */
- if (config0 & (1<<24)) {
+ if (config0 & MIPS_CONF_ISP) {
probe_spram("ISPRAM", 0x1c000000,
&ispram_load_tag, &ispram_store_tag);
}
- if (config0 & (1<<23))
+ if (config0 & MIPS_CONF_DSP)
probe_spram("DSPRAM", 0x1c100000,
&dspram_load_tag, &dspram_store_tag);
}