diff mbox series

[PATCH-for-8.0,v2,01/11] hw/mips/bootloader: Handle buffers as opaque arrays

Message ID 20221211204533.85359-2-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 
It is irrelevant to the API what the buffers to fill are made of.
In particular, some MIPS ISA have 16-bit wide instructions.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/mips/bootloader.c         | 55 +++++++++++++++++++++---------------
 hw/mips/malta.c              | 19 +++++++------
 include/hw/mips/bootloader.h | 10 +++----
 3 files changed, 48 insertions(+), 36 deletions(-)

Comments

Philippe Mathieu-Daudé Dec. 11, 2022, 8:52 p.m. UTC | #1 
On 11/12/22 21:45, Philippe Mathieu-Daudé wrote:
> It is irrelevant to the API what the buffers to fill are made of.
> In particular, some MIPS ISA have 16-bit wide instructions.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   hw/mips/bootloader.c         | 55 +++++++++++++++++++++---------------
>   hw/mips/malta.c              | 19 +++++++------
>   include/hw/mips/bootloader.h | 10 +++----
>   3 files changed, 48 insertions(+), 36 deletions(-)


> diff --git a/include/hw/mips/bootloader.h b/include/hw/mips/bootloader.h
> index fffb0b7da8..c32f6c2835 100644
> --- a/include/hw/mips/bootloader.h
> +++ b/include/hw/mips/bootloader.h
> @@ -11,16 +11,16 @@
>   
>   #include "exec/cpu-defs.h"
>   
> -void bl_gen_jump_to(uint32_t **p, target_ulong jump_addr);
> -void bl_gen_jump_kernel(uint32_t **p,
> +void bl_gen_jump_to(void **ptr, target_ulong jump_addr);
> +void bl_gen_jump_kernel(void **ptr,
>                           bool set_sp, target_ulong sp,
>                           bool set_a0, target_ulong a0,
>                           bool set_a1, target_ulong a1,
>                           bool set_a2, target_ulong a2,
>                           bool set_a3, target_ulong a3,
>                           target_ulong kernel_addr);
> -void bl_gen_write_ulong(uint32_t **p, target_ulong addr, target_ulong val);
> -void bl_gen_write_u32(uint32_t **p, target_ulong addr, uint32_t val);
> -void bl_gen_write_u64(uint32_t **p, target_ulong addr, uint64_t val);
> +void bl_gen_write_ulong(void **ptr, target_ulong addr, target_ulong val);
> +void bl_gen_write_u32(void **ptr, target_ulong addr, uint32_t val);
> +void bl_gen_write_u64(void **ptr, target_ulong addr, uint64_t val);

And I forgot to squash this...:

-- >8 --
diff --git a/hw/mips/boston.c b/hw/mips/boston.c
index edda87e23c..b6dd9fb200 100644
--- a/hw/mips/boston.c
+++ b/hw/mips/boston.c
@@ -323,7 +323,7 @@ static void boston_register_types(void)
  }
  type_init(boston_register_types)

-static void gen_firmware(uint32_t *p, hwaddr kernel_entry, hwaddr fdt_addr)
+static void gen_firmware(void *p, hwaddr kernel_entry, hwaddr fdt_addr)
  {
      uint64_t regaddr;

diff --git a/hw/mips/fuloong2e.c b/hw/mips/fuloong2e.c
index 34befa5dd5..cfc8ca6ae4 100644
--- a/hw/mips/fuloong2e.c
+++ b/hw/mips/fuloong2e.c
@@ -179,7 +179,7 @@ static void write_bootloader(CPUMIPSState *env, 
uint8_t *base,
      /* Second part of the bootloader */
      p = (uint32_t *)(base + 0x040);

-    bl_gen_jump_kernel(&p,
+    bl_gen_jump_kernel((void **)&p,
                         true, ENVP_VADDR - 64,
                         true, 2, true, ENVP_VADDR,
                         true, ENVP_VADDR + 8,
---
Richard Henderson Dec. 12, 2022, 1:46 p.m. UTC | #2 
On 12/11/22 14:52, Philippe Mathieu-Daudé wrote:
> On 11/12/22 21:45, Philippe Mathieu-Daudé wrote:
>> It is irrelevant to the API what the buffers to fill are made of.
>> In particular, some MIPS ISA have 16-bit wide instructions.
>>
>> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
>> ---
>>   hw/mips/bootloader.c         | 55 +++++++++++++++++++++---------------
>>   hw/mips/malta.c              | 19 +++++++------
>>   include/hw/mips/bootloader.h | 10 +++----
>>   3 files changed, 48 insertions(+), 36 deletions(-)
> 
> 
>> diff --git a/include/hw/mips/bootloader.h b/include/hw/mips/bootloader.h
>> index fffb0b7da8..c32f6c2835 100644
>> --- a/include/hw/mips/bootloader.h
>> +++ b/include/hw/mips/bootloader.h
>> @@ -11,16 +11,16 @@
>>   #include "exec/cpu-defs.h"
>> -void bl_gen_jump_to(uint32_t **p, target_ulong jump_addr);
>> -void bl_gen_jump_kernel(uint32_t **p,
>> +void bl_gen_jump_to(void **ptr, target_ulong jump_addr);
>> +void bl_gen_jump_kernel(void **ptr,
>>                           bool set_sp, target_ulong sp,
>>                           bool set_a0, target_ulong a0,
>>                           bool set_a1, target_ulong a1,
>>                           bool set_a2, target_ulong a2,
>>                           bool set_a3, target_ulong a3,
>>                           target_ulong kernel_addr);
>> -void bl_gen_write_ulong(uint32_t **p, target_ulong addr, target_ulong val);
>> -void bl_gen_write_u32(uint32_t **p, target_ulong addr, uint32_t val);
>> -void bl_gen_write_u64(uint32_t **p, target_ulong addr, uint64_t val);
>> +void bl_gen_write_ulong(void **ptr, target_ulong addr, target_ulong val);
>> +void bl_gen_write_u32(void **ptr, target_ulong addr, uint32_t val);
>> +void bl_gen_write_u64(void **ptr, target_ulong addr, uint64_t val);
> 
> And I forgot to squash this...:

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


r~

> 
> -- >8 --
> diff --git a/hw/mips/boston.c b/hw/mips/boston.c
> index edda87e23c..b6dd9fb200 100644
> --- a/hw/mips/boston.c
> +++ b/hw/mips/boston.c
> @@ -323,7 +323,7 @@ static void boston_register_types(void)
>   }
>   type_init(boston_register_types)
> 
> -static void gen_firmware(uint32_t *p, hwaddr kernel_entry, hwaddr fdt_addr)
> +static void gen_firmware(void *p, hwaddr kernel_entry, hwaddr fdt_addr)
>   {
>       uint64_t regaddr;
> 
> diff --git a/hw/mips/fuloong2e.c b/hw/mips/fuloong2e.c
> index 34befa5dd5..cfc8ca6ae4 100644
> --- a/hw/mips/fuloong2e.c
> +++ b/hw/mips/fuloong2e.c
> @@ -179,7 +179,7 @@ static void write_bootloader(CPUMIPSState *env, uint8_t *base,
>       /* Second part of the bootloader */
>       p = (uint32_t *)(base + 0x040);
> 
> -    bl_gen_jump_kernel(&p,
> +    bl_gen_jump_kernel((void **)&p,
>                          true, ENVP_VADDR - 64,
>                          true, 2, true, ENVP_VADDR,
>                          true, ENVP_VADDR + 8,
> ---
>
diff mbox series

Patch

diff --git a/hw/mips/bootloader.c b/hw/mips/bootloader.c
index f5f42f2bf2..21ffd4d772 100644
--- a/hw/mips/bootloader.c
+++ b/hw/mips/bootloader.c
@@ -55,16 +55,20 @@  static bool bootcpu_supports_isa(uint64_t isa_mask)
 }
 
 /* Base types */
-static void bl_gen_nop(uint32_t **p)
+static void bl_gen_nop(void **ptr)
 {
-    stl_p(*p, 0);
-    *p = *p + 1;
+    uint32_t *p = *ptr;
+
+    stl_p(p, 0);
+    p++;
+    *ptr = p;
 }
 
-static void bl_gen_r_type(uint32_t **p, uint8_t opcode,
+static void bl_gen_r_type(void **ptr, uint8_t opcode,
                           bl_reg rs, bl_reg rt, bl_reg rd,
                           uint8_t shift, uint8_t funct)
 {
+    uint32_t *p = *ptr;
     uint32_t insn = 0;
 
     insn = deposit32(insn, 26, 6, opcode);
@@ -74,13 +78,16 @@  static void bl_gen_r_type(uint32_t **p, uint8_t opcode,
     insn = deposit32(insn, 6, 5, shift);
     insn = deposit32(insn, 0, 6, funct);
 
-    stl_p(*p, insn);
-    *p = *p + 1;
+    stl_p(p, insn);
+    p++;
+
+    *ptr = p;
 }
 
-static void bl_gen_i_type(uint32_t **p, uint8_t opcode,
+static void bl_gen_i_type(void **ptr, uint8_t opcode,
                           bl_reg rs, bl_reg rt, uint16_t imm)
 {
+    uint32_t *p = *ptr;
     uint32_t insn = 0;
 
     insn = deposit32(insn, 26, 6, opcode);
@@ -88,12 +95,14 @@  static void bl_gen_i_type(uint32_t **p, uint8_t opcode,
     insn = deposit32(insn, 16, 5, rt);
     insn = deposit32(insn, 0, 16, imm);
 
-    stl_p(*p, insn);
-    *p = *p + 1;
+    stl_p(p, insn);
+    p++;
+
+    *ptr = p;
 }
 
 /* Single instructions */
-static void bl_gen_dsll(uint32_t **p, bl_reg rd, bl_reg rt, uint8_t sa)
+static void bl_gen_dsll(void **p, bl_reg rd, bl_reg rt, uint8_t sa)
 {
     if (bootcpu_supports_isa(ISA_MIPS3)) {
         bl_gen_r_type(p, 0, 0, rt, rd, sa, 0x38);
@@ -102,28 +111,28 @@  static void bl_gen_dsll(uint32_t **p, bl_reg rd, bl_reg rt, uint8_t sa)
     }
 }
 
-static void bl_gen_jalr(uint32_t **p, bl_reg rs)
+static void bl_gen_jalr(void **p, bl_reg rs)
 {
     bl_gen_r_type(p, 0, rs, 0, BL_REG_RA, 0, 0x09);
 }
 
-static void bl_gen_lui(uint32_t **p, bl_reg rt, uint16_t imm)
+static void bl_gen_lui(void **p, bl_reg rt, uint16_t imm)
 {
     /* R6: It's a alias of AUI with RS = 0 */
     bl_gen_i_type(p, 0x0f, 0, rt, imm);
 }
 
-static void bl_gen_ori(uint32_t **p, bl_reg rt, bl_reg rs, uint16_t imm)
+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(uint32_t **p, bl_reg rt, uint8_t base, uint16_t offset)
+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);
 }
 
-static void bl_gen_sd(uint32_t **p, bl_reg rt, uint8_t base, uint16_t offset)
+static void bl_gen_sd(void **p, bl_reg rt, uint8_t base, uint16_t offset)
 {
     if (bootcpu_supports_isa(ISA_MIPS3)) {
         bl_gen_i_type(p, 0x3f, base, rt, offset);
@@ -133,13 +142,13 @@  static void bl_gen_sd(uint32_t **p, bl_reg rt, uint8_t base, uint16_t offset)
 }
 
 /* Pseudo instructions */
-static void bl_gen_li(uint32_t **p, bl_reg rt, uint32_t imm)
+static void bl_gen_li(void **p, bl_reg rt, uint32_t imm)
 {
     bl_gen_lui(p, rt, extract32(imm, 16, 16));
     bl_gen_ori(p, rt, rt, extract32(imm, 0, 16));
 }
 
-static void bl_gen_dli(uint32_t **p, bl_reg rt, uint64_t imm)
+static void bl_gen_dli(void **p, bl_reg rt, uint64_t imm)
 {
     bl_gen_li(p, rt, extract64(imm, 32, 32));
     bl_gen_dsll(p, rt, rt, 16);
@@ -148,7 +157,7 @@  static void bl_gen_dli(uint32_t **p, bl_reg rt, uint64_t imm)
     bl_gen_ori(p, rt, rt, extract64(imm, 0, 16));
 }
 
-static void bl_gen_load_ulong(uint32_t **p, bl_reg rt, target_ulong imm)
+static void bl_gen_load_ulong(void **p, bl_reg rt, target_ulong imm)
 {
     if (bootcpu_supports_isa(ISA_MIPS3)) {
         bl_gen_dli(p, rt, imm); /* 64bit */
@@ -158,14 +167,14 @@  static void bl_gen_load_ulong(uint32_t **p, bl_reg rt, target_ulong imm)
 }
 
 /* Helpers */
-void bl_gen_jump_to(uint32_t **p, target_ulong jump_addr)
+void bl_gen_jump_to(void **p, target_ulong jump_addr)
 {
     bl_gen_load_ulong(p, BL_REG_T9, jump_addr);
     bl_gen_jalr(p, BL_REG_T9);
     bl_gen_nop(p); /* delay slot */
 }
 
-void bl_gen_jump_kernel(uint32_t **p,
+void bl_gen_jump_kernel(void **p,
                         bool set_sp, target_ulong sp,
                         bool set_a0, target_ulong a0,
                         bool set_a1, target_ulong a1,
@@ -192,7 +201,7 @@  void bl_gen_jump_kernel(uint32_t **p,
     bl_gen_jump_to(p, kernel_addr);
 }
 
-void bl_gen_write_ulong(uint32_t **p, target_ulong addr, target_ulong val)
+void bl_gen_write_ulong(void **p, target_ulong addr, target_ulong val)
 {
     bl_gen_load_ulong(p, BL_REG_K0, val);
     bl_gen_load_ulong(p, BL_REG_K1, addr);
@@ -203,14 +212,14 @@  void bl_gen_write_ulong(uint32_t **p, target_ulong addr, target_ulong val)
     }
 }
 
-void bl_gen_write_u32(uint32_t **p, target_ulong addr, uint32_t val)
+void bl_gen_write_u32(void **p, target_ulong addr, uint32_t val)
 {
     bl_gen_li(p, BL_REG_K0, val);
     bl_gen_load_ulong(p, BL_REG_K1, addr);
     bl_gen_sw(p, BL_REG_K0, BL_REG_K1, 0x0);
 }
 
-void bl_gen_write_u64(uint32_t **p, target_ulong addr, uint64_t val)
+void bl_gen_write_u64(void **p, target_ulong addr, uint64_t val)
 {
     bl_gen_dli(p, BL_REG_K0, val);
     bl_gen_load_ulong(p, BL_REG_K1, addr);
diff --git a/hw/mips/malta.c b/hw/mips/malta.c
index 1f4e0c7acc..8f84846f97 100644
--- a/hw/mips/malta.c
+++ b/hw/mips/malta.c
@@ -838,6 +838,7 @@  static void write_bootloader(uint8_t *base, uint64_t run_addr,
                              uint64_t kernel_entry)
 {
     uint32_t *p;
+    void *v;
 
     /* Small bootloader */
     p = (uint32_t *)base;
@@ -880,38 +881,39 @@  static void write_bootloader(uint8_t *base, uint64_t run_addr,
 #else
 #define cpu_to_gt32 cpu_to_be32
 #endif
+    v = p;
 
     /* move GT64120 registers from 0x14000000 to 0x1be00000 */
-    bl_gen_write_u32(&p, /* GT_ISD */
+    bl_gen_write_u32(&v, /* GT_ISD */
                      cpu_mips_phys_to_kseg1(NULL, 0x14000000 + 0x68),
                      cpu_to_gt32(0x1be00000 << 3));
 
     /* setup MEM-to-PCI0 mapping */
     /* setup PCI0 io window to 0x18000000-0x181fffff */
-    bl_gen_write_u32(&p, /* GT_PCI0IOLD */
+    bl_gen_write_u32(&v, /* GT_PCI0IOLD */
                      cpu_mips_phys_to_kseg1(NULL, 0x1be00000 + 0x48),
                      cpu_to_gt32(0x18000000 << 3));
-    bl_gen_write_u32(&p, /* GT_PCI0IOHD */
+    bl_gen_write_u32(&v, /* GT_PCI0IOHD */
                      cpu_mips_phys_to_kseg1(NULL, 0x1be00000 + 0x50),
                      cpu_to_gt32(0x08000000 << 3));
     /* setup PCI0 mem windows */
-    bl_gen_write_u32(&p, /* GT_PCI0M0LD */
+    bl_gen_write_u32(&v, /* GT_PCI0M0LD */
                      cpu_mips_phys_to_kseg1(NULL, 0x1be00000 + 0x58),
                      cpu_to_gt32(0x10000000 << 3));
-    bl_gen_write_u32(&p, /* GT_PCI0M0HD */
+    bl_gen_write_u32(&v, /* GT_PCI0M0HD */
                      cpu_mips_phys_to_kseg1(NULL, 0x1be00000 + 0x60),
                      cpu_to_gt32(0x07e00000 << 3));
 
-    bl_gen_write_u32(&p, /* GT_PCI0M1LD */
+    bl_gen_write_u32(&v, /* GT_PCI0M1LD */
                      cpu_mips_phys_to_kseg1(NULL, 0x1be00000 + 0x80),
                      cpu_to_gt32(0x18200000 << 3));
-    bl_gen_write_u32(&p, /* GT_PCI0M1HD */
+    bl_gen_write_u32(&v, /* GT_PCI0M1HD */
                      cpu_mips_phys_to_kseg1(NULL, 0x1be00000 + 0x88),
                      cpu_to_gt32(0x0bc00000 << 3));
 
 #undef cpu_to_gt32
 
-    bl_gen_jump_kernel(&p,
+    bl_gen_jump_kernel(&v,
                        true, ENVP_VADDR - 64,
                        /*
                         * If semihosting is used, arguments have already been
@@ -922,6 +924,7 @@  static void write_bootloader(uint8_t *base, uint64_t run_addr,
                        true, ENVP_VADDR + 8,
                        true, loaderparams.ram_low_size,
                        kernel_entry);
+    p = v;
 
     /* YAMON subroutines */
     p = (uint32_t *) (base + 0x800);
diff --git a/include/hw/mips/bootloader.h b/include/hw/mips/bootloader.h
index fffb0b7da8..c32f6c2835 100644
--- a/include/hw/mips/bootloader.h
+++ b/include/hw/mips/bootloader.h
@@ -11,16 +11,16 @@ 
 
 #include "exec/cpu-defs.h"
 
-void bl_gen_jump_to(uint32_t **p, target_ulong jump_addr);
-void bl_gen_jump_kernel(uint32_t **p,
+void bl_gen_jump_to(void **ptr, target_ulong jump_addr);
+void bl_gen_jump_kernel(void **ptr,
                         bool set_sp, target_ulong sp,
                         bool set_a0, target_ulong a0,
                         bool set_a1, target_ulong a1,
                         bool set_a2, target_ulong a2,
                         bool set_a3, target_ulong a3,
                         target_ulong kernel_addr);
-void bl_gen_write_ulong(uint32_t **p, target_ulong addr, target_ulong val);
-void bl_gen_write_u32(uint32_t **p, target_ulong addr, uint32_t val);
-void bl_gen_write_u64(uint32_t **p, target_ulong addr, uint64_t val);
+void bl_gen_write_ulong(void **ptr, target_ulong addr, target_ulong val);
+void bl_gen_write_u32(void **ptr, target_ulong addr, uint32_t val);
+void bl_gen_write_u64(void **ptr, target_ulong addr, uint64_t val);
 
 #endif