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include: Remove redundant csr_read_n() and csr_write_n()

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The patch removes redundant csr_read_n() and csr_write_n()
because same thing can be achieved by using __ASM_STR()
macro in csr_read() and csr_write() macros.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Anup Patel
2018-12-31 10:25:42 +05:30
committed by Anup Patel
parent d0bbbbb8fd
commit 81e8950abe
2 changed files with 42 additions and 59 deletions
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21
include/sbi/riscv_asm.h
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@@ -140,16 +140,7 @@
#define csr_read(csr) \
({ \
register unsigned long __v; \
__asm__ __volatile__ ("csrr %0, " #csr \
: "=r" (__v) : \
: "memory"); \
__v; \
})
#define csr_read_n(csr_num) \
({ \
register unsigned long __v; \
__asm__ __volatile__ ("csrr %0, " __ASM_STR(csr_num) \
__asm__ __volatile__ ("csrr %0, " __ASM_STR(csr) \
: "=r" (__v) : \
: "memory"); \
__v; \
@@ -158,15 +149,7 @@
#define csr_write(csr, val) \
({ \
unsigned long __v = (unsigned long)(val); \
__asm__ __volatile__ ("csrw " #csr ", %0" \
: : "rK" (__v) \
: "memory"); \
})
#define csr_write_n(csr_num, val) \
({ \
unsigned long __v = (unsigned long)(val); \
__asm__ __volatile__ ("csrw " __ASM_STR(csr_num) ", %0" \
__asm__ __volatile__ ("csrw " __ASM_STR(csr) ", %0" \
: : "rK" (__v) \
: "memory"); \
})