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include: Make sbi_current_hartid() as macro in riscv_asm.h

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The sbi_current_hartid() being a regular function is quite
expensive because for callers it is a function call instead
of a direct CSR read. This patch converts sbi_current_hartid()
into a macro in riscv_asm.h.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2020-03-12 10:21:25 +05:30
committed by Anup Patel
parent 16e7071f6d
commit 823345ecae
20 changed files with 49 additions and 52 deletions
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8
lib/sbi/sbi_hart.c
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@@ -17,14 +17,6 @@
#include <sbi/sbi_hart.h>
#include <sbi/sbi_platform.h>
/**
* Return HART ID of the caller.
*/
unsigned int sbi_current_hartid()
{
return (u32)csr_read(CSR_MHARTID);
}
static void mstatus_init(struct sbi_scratch *scratch, u32 hartid)
{
const struct sbi_platform *plat = sbi_platform_ptr(scratch);