riscv: Introduce a new config for SBI v0.1
We now have SBI v0.2 which is more scalable and extendable to handle
future needs for RISC-V supervisor interfaces.
Introduce a new config and move all SBI v0.1 code under that config.
This allows to implement the new replacement SBI extensions cleanly
and remove v0.1 extensions easily in future. Currently, the config
is enabled by default. Once all M-mode software, with v0.1, is no
longer in use, this config option and all relevant code can be easily
removed.
This commit is inspired from Linux kernel patch:
https://patchwork.kernel.org/patch/11407361/
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Pragnesh Patel <pragnesh.patel@sifive.com>
diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index 6d3114c..c65104f 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -12,6 +12,7 @@
#include <linux/types.h>
enum sbi_ext_id {
+#ifdef CONFIG_SBI_V01
SBI_EXT_0_1_SET_TIMER = 0x0,
SBI_EXT_0_1_CONSOLE_PUTCHAR = 0x1,
SBI_EXT_0_1_CONSOLE_GETCHAR = 0x2,
@@ -21,6 +22,7 @@
SBI_EXT_0_1_REMOTE_SFENCE_VMA = 0x6,
SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID = 0x7,
SBI_EXT_0_1_SHUTDOWN = 0x8,
+#endif
SBI_EXT_BASE = 0x10,
SBI_EXT_TIME = 0x54494D45,
SBI_EXT_IPI = 0x735049,
@@ -75,10 +77,12 @@
unsigned long arg3, unsigned long arg4,
unsigned long arg5);
+#ifdef CONFIG_SBI_V01
void sbi_console_putchar(int ch);
int sbi_console_getchar(void);
void sbi_clear_ipi(void);
void sbi_shutdown(void);
+#endif
void sbi_set_timer(uint64_t stime_value);
void sbi_send_ipi(const unsigned long *hart_mask);
void sbi_remote_fence_i(const unsigned long *hart_mask);