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RISC-V: Access CSRs using CSR numbers

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We should prefer accessing CSRs using their CSR numbers because:
1. It compiles fine with older toolchains.
2. We can use latest CSR names in #define macro names of CSR numbers
   as-per RISC-V spec.
3. We can access newly added CSRs even if toolchain does not recognize
   newly addes CSRs by name.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
This commit is contained in:
Anup Patel
2019-04-25 08:38:41 +00:00
committed by Palmer Dabbelt
parent 6dcaf00487
commit a3182c91ef
9 changed files with 57 additions and 48 deletions
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10
arch/riscv/include/asm/irqflags.h
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@@ -21,25 +21,25 @@
/* read interrupt enabled status */
static inline unsigned long arch_local_save_flags(void)
{
return csr_read(sstatus);
return csr_read(CSR_SSTATUS);
}
/* unconditionally enable interrupts */
static inline void arch_local_irq_enable(void)
{
csr_set(sstatus, SR_SIE);
csr_set(CSR_SSTATUS, SR_SIE);
}
/* unconditionally disable interrupts */
static inline void arch_local_irq_disable(void)
{
csr_clear(sstatus, SR_SIE);
csr_clear(CSR_SSTATUS, SR_SIE);
}
/* get status and disable interrupts */
static inline unsigned long arch_local_irq_save(void)
{
return csr_read_clear(sstatus, SR_SIE);
return csr_read_clear(CSR_SSTATUS, SR_SIE);
}
/* test flags */
@@ -57,7 +57,7 @@ static inline int arch_irqs_disabled(void)
/* set interrupt enabled status */
static inline void arch_local_irq_restore(unsigned long flags)
{
csr_set(sstatus, flags & SR_SIE);
csr_set(CSR_SSTATUS, flags & SR_SIE);
}
#endif /* _ASM_RISCV_IRQFLAGS_H */