platform: generic: allwinner: Optimize current hart scratch access

SiFiveHolland · avpatel · commit f5375bc15e9f · 2024-04-05T17:34:25.000+05:30
The address of the local scratch area is stored in each hart's mscratch
CSR. It is more efficient to read the CSR than to compute the address
from the hart ID.

Signed-off-by: Samuel Holland &lt;samuel.holland@sifive.com&gt;
Reviewed-by: Anup Patel &lt;anup@brainfault.org&gt;
diff --git a/platform/generic/allwinner/sun20i-d1.c b/platform/generic/allwinner/sun20i-d1.c
@@ -142,7 +142,7 @@ static void sun20i_d1_riscv_cfg_restore(void)
 
 static void sun20i_d1_riscv_cfg_init(void)
 {
-	u64 entry = sbi_hartid_to_scratch(0)->warmboot_addr;
+	u64 entry = sbi_scratch_thishart_ptr()->warmboot_addr;
 
 	/* Enable MMIO access. */
 	writel_relaxed(CCU_BGR_ENABLE, SUN20I_D1_CCU_BASE + RISCV_CFG_BGR_REG);

Original file line number	Diff line number	Diff line change
`@@ -142,7 +142,7 @@ static void sun20i_d1_riscv_cfg_restore(void)`
`142`	`142`
`143`	`143`	`static void sun20i_d1_riscv_cfg_init(void)`
`144`	`144`	`{`
`145`		`- u64 entry = sbi_hartid_to_scratch(0)->warmboot_addr;`
	`145`	`+ u64 entry = sbi_scratch_thishart_ptr()->warmboot_addr;`
`146`	`146`
`147`	`147`	`/* Enable MMIO access. */`
`148`	`148`	`writel_relaxed(CCU_BGR_ENABLE, SUN20I_D1_CCU_BASE + RISCV_CFG_BGR_REG);`