diff options
| author | WANG Xuerui <git@xen0n.name> | 2023-05-01 17:19:10 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2023-05-01 17:19:10 +0800 |
| commit | efada2afacee7b5e59b3182bc36ddfb0fad2b0e2 (patch) | |
| tree | 4f6666fde31a201d18c81ea799fa1863613aaabe /arch/loongarch | |
| parent | 05fa8d4977d727cf41294ea09b4a5085cba4ad54 (diff) | |
LoongArch: Humanize the CRMD line when showing registers
Example output looks like:
[ xx.xxxxxx] CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE)
Some initial machinery for this pretty-printing format has been included
in this patch as well.
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch')
| -rw-r--r-- | arch/loongarch/kernel/traps.c | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/arch/loongarch/kernel/traps.c b/arch/loongarch/kernel/traps.c index 434a7717face..97af82547725 100644 --- a/arch/loongarch/kernel/traps.c +++ b/arch/loongarch/kernel/traps.c @@ -3,6 +3,7 @@ * Author: Huacai Chen <chenhuacai@loongson.cn> * Copyright (C) 2020-2022 Loongson Technology Corporation Limited */ +#include <linux/bitfield.h> #include <linux/bitops.h> #include <linux/bug.h> #include <linux/compiler.h> @@ -153,6 +154,54 @@ static void show_code(unsigned int *pc, bool user) pr_cont("\n"); } +static void print_bool_fragment(const char *key, unsigned long val, bool first) +{ + /* e.g. "+PG", "-DA" */ + pr_cont("%s%c%s", first ? "" : " ", val ? '+' : '-', key); +} + +static void print_plv_fragment(const char *key, int val) +{ + /* e.g. "PLV0", "PPLV3" */ + pr_cont("%s%d", key, val); +} + +static void print_memory_type_fragment(const char *key, unsigned long val) +{ + const char *humanized_type; + + switch (val) { + case 0: + humanized_type = "SUC"; + break; + case 1: + humanized_type = "CC"; + break; + case 2: + humanized_type = "WUC"; + break; + default: + pr_cont(" %s=Reserved(%lu)", key, val); + return; + } + + /* e.g. " DATM=WUC" */ + pr_cont(" %s=%s", key, humanized_type); +} + +static void print_crmd(unsigned long x) +{ + printk(" CRMD: %08lx (", x); + print_plv_fragment("PLV", (int) FIELD_GET(CSR_CRMD_PLV, x)); + print_bool_fragment("IE", FIELD_GET(CSR_CRMD_IE, x), false); + print_bool_fragment("DA", FIELD_GET(CSR_CRMD_DA, x), false); + print_bool_fragment("PG", FIELD_GET(CSR_CRMD_PG, x), false); + print_memory_type_fragment("DACF", FIELD_GET(CSR_CRMD_DACF, x)); + print_memory_type_fragment("DACM", FIELD_GET(CSR_CRMD_DACM, x)); + print_bool_fragment("WE", FIELD_GET(CSR_CRMD_WE, x), false); + pr_cont(")\n"); +} + static void __show_regs(const struct pt_regs *regs) { const int field = 2 * sizeof(unsigned long); @@ -194,7 +243,7 @@ static void __show_regs(const struct pt_regs *regs) #undef GPR_FIELD /* Print saved important CSRs */ - printk(" CRMD: %08lx\n", regs->csr_crmd); + print_crmd(regs->csr_crmd); printk(" PRMD: %08lx\n", regs->csr_prmd); printk(" EUEN: %08lx\n", regs->csr_euen); printk(" ECFG: %08lx\n", regs->csr_ecfg); |