diff mbox series

[PATCH-for-8.0,v2,03/11] hw/mips/bootloader: Implement nanoMIPS SW opcode generator

Message ID 20221211204533.85359-4-philmd@linaro.org
State New
Headers show
Series hw/mips/malta: Generate nanoMIPS bootloader with bootloader generator API | expand

Commit Message

Philippe Mathieu-Daudé Dec. 11, 2022, 8:45 p.m. UTC 
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/mips/bootloader.c | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

Comments

Richard Henderson Dec. 12, 2022, 1:50 p.m. UTC | #1 
On 12/11/22 14:45, Philippe Mathieu-Daudé wrote:
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   hw/mips/bootloader.c | 20 +++++++++++++++++++-
>   1 file changed, 19 insertions(+), 1 deletion(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


r~
> 
> diff --git a/hw/mips/bootloader.c b/hw/mips/bootloader.c
> index 0035f37335..3e1e73360f 100644
> --- a/hw/mips/bootloader.c
> +++ b/hw/mips/bootloader.c
> @@ -143,9 +143,27 @@ static void bl_gen_ori(void **p, bl_reg rt, bl_reg rs, uint16_t imm)
>       bl_gen_i_type(p, 0x0d, rs, rt, imm);
>   }
>   
> +static void bl_gen_sw_nm(void **ptr, bl_reg rt, uint8_t rs, uint16_t ofs12)
> +{
> +    uint32_t insn = 0;
> +
> +    assert(extract32(ofs12, 0, 12) == ofs12);
> +    insn = deposit32(insn, 26, 6, 0b100001);
> +    insn = deposit32(insn, 21, 5, rt);
> +    insn = deposit32(insn, 16, 5, rs);
> +    insn = deposit32(insn, 12, 4, 0b1001);
> +    insn = deposit32(insn, 0, 12, ofs12);
> +
> +    st_nm32_p(ptr, insn);
> +}
> +
>   static void bl_gen_sw(void **p, bl_reg rt, uint8_t base, uint16_t offset)
>   {
> -    bl_gen_i_type(p, 0x2b, base, rt, offset);
> +    if (bootcpu_supports_isa(ISA_NANOMIPS32)) {
> +        bl_gen_sw_nm(p, rt, base, offset);
> +    } else {
> +        bl_gen_i_type(p, 0x2b, base, rt, offset);
> +    }
>   }
>   
>   static void bl_gen_sd(void **p, bl_reg rt, uint8_t base, uint16_t offset)
diff mbox series

Patch

diff --git a/hw/mips/bootloader.c b/hw/mips/bootloader.c
index 0035f37335..3e1e73360f 100644
--- a/hw/mips/bootloader.c
+++ b/hw/mips/bootloader.c
@@ -143,9 +143,27 @@  static void bl_gen_ori(void **p, bl_reg rt, bl_reg rs, uint16_t imm)
     bl_gen_i_type(p, 0x0d, rs, rt, imm);
 }
 
+static void bl_gen_sw_nm(void **ptr, bl_reg rt, uint8_t rs, uint16_t ofs12)
+{
+    uint32_t insn = 0;
+
+    assert(extract32(ofs12, 0, 12) == ofs12);
+    insn = deposit32(insn, 26, 6, 0b100001);
+    insn = deposit32(insn, 21, 5, rt);
+    insn = deposit32(insn, 16, 5, rs);
+    insn = deposit32(insn, 12, 4, 0b1001);
+    insn = deposit32(insn, 0, 12, ofs12);
+
+    st_nm32_p(ptr, insn);
+}
+
 static void bl_gen_sw(void **p, bl_reg rt, uint8_t base, uint16_t offset)
 {
-    bl_gen_i_type(p, 0x2b, base, rt, offset);
+    if (bootcpu_supports_isa(ISA_NANOMIPS32)) {
+        bl_gen_sw_nm(p, rt, base, offset);
+    } else {
+        bl_gen_i_type(p, 0x2b, base, rt, offset);
+    }
 }
 
 static void bl_gen_sd(void **p, bl_reg rt, uint8_t base, uint16_t offset)