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[PATCH-for-8.0 v2 02/11] hw/mips/bootloader: Implement nanoMIPS NOP opco
From: |
Philippe Mathieu-Daudé |
Subject: |
[PATCH-for-8.0 v2 02/11] hw/mips/bootloader: Implement nanoMIPS NOP opcode generator |
Date: |
Sun, 11 Dec 2022 21:45:24 +0100 |
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
hw/mips/bootloader.c | 24 ++++++++++++++++++++----
1 file changed, 20 insertions(+), 4 deletions(-)
diff --git a/hw/mips/bootloader.c b/hw/mips/bootloader.c
index 21ffd4d772..0035f37335 100644
--- a/hw/mips/bootloader.c
+++ b/hw/mips/bootloader.c
@@ -54,14 +54,30 @@ static bool bootcpu_supports_isa(uint64_t isa_mask)
return cpu_supports_isa(&MIPS_CPU(first_cpu)->env, isa_mask);
}
+static void st_nm32_p(void **ptr, uint32_t insn)
+{
+ uint16_t *p = *ptr;
+
+ stw_p(p, insn >> 16);
+ p++;
+ stw_p(p, insn >> 0);
+ p++;
+
+ *ptr = p;
+}
+
/* Base types */
static void bl_gen_nop(void **ptr)
{
- uint32_t *p = *ptr;
+ if (bootcpu_supports_isa(ISA_NANOMIPS32)) {
+ st_nm32_p(ptr, 0x8000c000);
+ } else {
+ uint32_t *p = *ptr;
- stl_p(p, 0);
- p++;
- *ptr = p;
+ stl_p(p, 0);
+ p++;
+ *ptr = p;
+ }
}
static void bl_gen_r_type(void **ptr, uint8_t opcode,
--
2.38.1
- [PATCH-for-8.0 v2 00/11] hw/mips/malta: Generate nanoMIPS bootloader with bootloader generator API, Philippe Mathieu-Daudé, 2022/12/11
- [PATCH-for-8.0 v2 01/11] hw/mips/bootloader: Handle buffers as opaque arrays, Philippe Mathieu-Daudé, 2022/12/11
- [PATCH-for-8.0 v2 02/11] hw/mips/bootloader: Implement nanoMIPS NOP opcode generator,
Philippe Mathieu-Daudé <=
- [PATCH-for-8.0 v2 03/11] hw/mips/bootloader: Implement nanoMIPS SW opcode generator, Philippe Mathieu-Daudé, 2022/12/11
- [PATCH-for-8.0 v2 04/11] hw/mips/bootloader: Implement nanoMIPS LI (LUI+ORI) opcode generator, Philippe Mathieu-Daudé, 2022/12/11
- [PATCH-for-8.0 v2 05/11] hw/mips/bootloader: Implement nanoMIPS JALRc opcode generator, Philippe Mathieu-Daudé, 2022/12/11
- [PATCH-for-8.0 v2 06/11] hw/mips/malta: Use bootloader generator API for nanoMIPS CPUs (1/5), Philippe Mathieu-Daudé, 2022/12/11
- [PATCH-for-8.0 v2 07/11] hw/mips/malta: Use bootloader generator API for nanoMIPS CPUs (2/5), Philippe Mathieu-Daudé, 2022/12/11