riscv: add run mode configuration for SPL
U-Boot SPL can be run in a different privilege mode from U-Boot proper.
Add new configuration entries for SPL to allow the run mode to be
configured independently of U-Boot proper.
Extend all uses of the CONFIG_RISCV_SMODE and CONFIG_RISCV_MMODE
configuration symbols to also cover the SPL equivalents. Ensure that
files compatible with only one privilege mode are not included in builds
targeting an incompatible privilege mode.
Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 8cfc7d0..b8d01ba 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -113,6 +113,23 @@
endchoice
+choice
+ prompt "SPL Run Mode"
+ default SPL_RISCV_MMODE
+ depends on SPL
+
+config SPL_RISCV_MMODE
+ bool "Machine"
+ help
+ Choose this option to build U-Boot SPL for RISC-V M-Mode.
+
+config SPL_RISCV_SMODE
+ bool "Supervisor"
+ help
+ Choose this option to build U-Boot SPL for RISC-V S-Mode.
+
+endchoice
+
config RISCV_ISA_C
bool "Emit compressed instructions"
default y
@@ -132,34 +149,40 @@
config SIFIVE_CLINT
bool
- depends on RISCV_MMODE
+ depends on RISCV_MMODE || SPL_RISCV_MMODE
select REGMAP
select SYSCON
+ select SPL_REGMAP if SPL
+ select SPL_SYSCON if SPL
help
The SiFive CLINT block holds memory-mapped control and status registers
associated with software and timer interrupts.
config ANDES_PLIC
bool
- depends on RISCV_MMODE
+ depends on RISCV_MMODE || SPL_RISCV_MMODE
select REGMAP
select SYSCON
+ select SPL_REGMAP if SPL
+ select SPL_SYSCON if SPL
help
The Andes PLIC block holds memory-mapped claim and pending registers
associated with software interrupt.
config ANDES_PLMT
bool
- depends on RISCV_MMODE
+ depends on RISCV_MMODE || SPL_RISCV_MMODE
select REGMAP
select SYSCON
+ select SPL_REGMAP if SPL
+ select SPL_SYSCON if SPL
help
The Andes PLMT block holds memory-mapped mtime register
associated with timer tick.
config RISCV_RDTIME
bool
- default y if RISCV_SMODE
+ default y if RISCV_SMODE || SPL_RISCV_SMODE
help
The provides the riscv_get_time() API that is implemented using the
standard rdtime instruction. This is the case for S-mode U-Boot, and
@@ -189,7 +212,7 @@
config SBI_IPI
bool
- default y if RISCV_SMODE
+ default y if RISCV_SMODE || SPL_RISCV_SMODE
depends on SMP
config XIP
diff --git a/arch/riscv/cpu/ax25/Kconfig b/arch/riscv/cpu/ax25/Kconfig
index 6b4b92e..f4b59cb 100644
--- a/arch/riscv/cpu/ax25/Kconfig
+++ b/arch/riscv/cpu/ax25/Kconfig
@@ -4,8 +4,8 @@
imply CPU
imply CPU_RISCV
imply RISCV_TIMER
- imply ANDES_PLIC if RISCV_MMODE
- imply ANDES_PLMT if RISCV_MMODE
+ imply ANDES_PLIC if (RISCV_MMODE || SPL_RISCV_MMODE)
+ imply ANDES_PLMT if (RISCV_MMODE || SPL_RISCV_MMODE)
help
Run U-Boot on AndeStar V5 platforms and use some specific features
which are provided by Andes Technology AndeStar V5 families.
@@ -14,7 +14,7 @@
config RISCV_NDS_CACHE
bool "AndeStar V5 families specific cache support"
- depends on RISCV_MMODE
+ depends on RISCV_MMODE || SPL_RISCV_MMODE
help
Provide Andes Technology AndeStar V5 families specific cache support.
diff --git a/arch/riscv/cpu/cpu.c b/arch/riscv/cpu/cpu.c
index 5ca1857..e457f6a 100644
--- a/arch/riscv/cpu/cpu.c
+++ b/arch/riscv/cpu/cpu.c
@@ -46,13 +46,13 @@
return false;
#else /* !CONFIG_CPU */
-#ifdef CONFIG_RISCV_MMODE
+#if CONFIG_IS_ENABLED(RISCV_MMODE)
return csr_read(CSR_MISA) & (1 << (ext - 'a'));
-#else /* !CONFIG_RISCV_MMODE */
+#else /* !CONFIG_IS_ENABLED(RISCV_MMODE) */
#warning "There is no way to determine the available extensions in S-mode."
#warning "Please convert your board to use the RISC-V CPU driver."
return false;
-#endif /* CONFIG_RISCV_MMODE */
+#endif /* CONFIG_IS_ENABLED(RISCV_MMODE) */
#endif /* CONFIG_CPU */
}
diff --git a/arch/riscv/cpu/generic/Kconfig b/arch/riscv/cpu/generic/Kconfig
index 1d6ab50..b7552f5 100644
--- a/arch/riscv/cpu/generic/Kconfig
+++ b/arch/riscv/cpu/generic/Kconfig
@@ -8,5 +8,5 @@
imply CPU
imply CPU_RISCV
imply RISCV_TIMER
- imply SIFIVE_CLINT if RISCV_MMODE
+ imply SIFIVE_CLINT if (RISCV_MMODE || SPL_RISCV_MMODE)
imply CMD_CPU
diff --git a/arch/riscv/cpu/start.S b/arch/riscv/cpu/start.S
index e06db40..e82ee9e 100644
--- a/arch/riscv/cpu/start.S
+++ b/arch/riscv/cpu/start.S
@@ -39,7 +39,7 @@
.section .text
.globl _start
_start:
-#ifdef CONFIG_RISCV_MMODE
+#if CONFIG_IS_ENABLED(RISCV_MMODE)
csrr a0, CSR_MHARTID
#endif
@@ -62,7 +62,7 @@
#ifdef CONFIG_SMP
/* set xSIE bit to receive IPIs */
-#ifdef CONFIG_RISCV_MMODE
+#if CONFIG_IS_ENABLED(RISCV_MMODE)
li t0, MIE_MSIE
#else
li t0, SIE_SSIE
@@ -344,7 +344,7 @@
#ifdef CONFIG_SMP
csrr t0, MODE_PREFIX(ip)
-#ifdef CONFIG_RISCV_MMODE
+#if CONFIG_IS_ENABLED(RISCV_MMODE)
andi t0, t0, MIE_MSIE
#else
andi t0, t0, SIE_SSIE
diff --git a/arch/riscv/include/asm/encoding.h b/arch/riscv/include/asm/encoding.h
index c450eb9..a0695da 100644
--- a/arch/riscv/include/asm/encoding.h
+++ b/arch/riscv/include/asm/encoding.h
@@ -9,7 +9,7 @@
#include <asm/csr.h>
-#ifdef CONFIG_RISCV_SMODE
+#if CONFIG_IS_ENABLED(RISCV_SMODE)
#define MODE_PREFIX(__suffix) s##__suffix
#else
#define MODE_PREFIX(__suffix) m##__suffix
diff --git a/arch/riscv/lib/Makefile b/arch/riscv/lib/Makefile
index 6ae6ebb..e4bc5df 100644
--- a/arch/riscv/lib/Makefile
+++ b/arch/riscv/lib/Makefile
@@ -10,13 +10,16 @@
obj-$(CONFIG_CMD_BOOTI) += bootm.o image.o
obj-$(CONFIG_CMD_GO) += boot.o
obj-y += cache.o
-obj-$(CONFIG_RISCV_RDTIME) += rdtime.o
+ifeq ($(CONFIG_$(SPL_)RISCV_MMODE),y)
obj-$(CONFIG_SIFIVE_CLINT) += sifive_clint.o
obj-$(CONFIG_ANDES_PLIC) += andes_plic.o
obj-$(CONFIG_ANDES_PLMT) += andes_plmt.o
+else
+obj-$(CONFIG_RISCV_RDTIME) += rdtime.o
+obj-$(CONFIG_SBI_IPI) += sbi_ipi.o
+endif
obj-y += interrupts.o
obj-y += reset.o
-obj-$(CONFIG_SBI_IPI) += sbi_ipi.o
obj-y += setjmp.o
obj-$(CONFIG_SMP) += smp.o