hw/riscv/boot.c: introduce riscv_default_firmware_name()

Some boards are duplicating the 'riscv_find_and_load_firmware' call
because the 32 and 64 bits images have different names. Create
a function to handle this detail instead of hardcoding it in the boards.

Ideally we would bake this logic inside riscv_find_and_load_firmware(),
or even create a riscv_load_default_firmware(), but at this moment we
cannot infer whether the machine is running 32 or 64 bits without
accessing RISCVHartArrayState, which in turn can't be accessed via the
common code from boot.c. In the end we would exchange 'firmware_name'
for a flag with riscv_is_32bit(), which isn't much better than what we
already have today.

Cc: Palmer Dabbelt <palmer@dabbelt.com>
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng@tinylab.org>
Signed-off-by: Bin Meng <bmeng@tinylab.org>
Message-Id: <20221221182300.307900-6-dbarboza@ventanamicro.com>
Message-Id: <20221229091828.1945072-11-bmeng@tinylab.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

hw/riscv/boot.c

@@ -75,6 +75,15 @@ target_ulong riscv_calc_kernel_start_addr(RISCVHartArrayState *harts,
     }
 }
 
+const char *riscv_default_firmware_name(RISCVHartArrayState *harts)
+{
+    if (riscv_is_32bit(harts)) {
+        return RISCV32_BIOS_BIN;
+    }
+
+    return RISCV64_BIOS_BIN;
+}
+
 static char *riscv_find_firmware(const char *firmware_filename)
 {
     char *filename;

hw/riscv/sifive_u.c

@@ -533,6 +533,7 @@ static void sifive_u_machine_init(MachineState *machine)
     MemoryRegion *flash0 = g_new(MemoryRegion, 1);
     target_ulong start_addr = memmap[SIFIVE_U_DEV_DRAM].base;
     target_ulong firmware_end_addr, kernel_start_addr;
+    const char *firmware_name;
     uint32_t start_addr_hi32 = 0x00000000;
     int i;
     uint32_t fdt_load_addr;
@@ -595,13 +596,9 @@ static void sifive_u_machine_init(MachineState *machine)
         break;
     }
 
-    if (riscv_is_32bit(&s->soc.u_cpus)) {
-        firmware_end_addr = riscv_find_and_load_firmware(machine,
-                                    RISCV32_BIOS_BIN, start_addr, NULL);
-    } else {
-        firmware_end_addr = riscv_find_and_load_firmware(machine,
-                                    RISCV64_BIOS_BIN, start_addr, NULL);
-    }
+    firmware_name = riscv_default_firmware_name(&s->soc.u_cpus);
+    firmware_end_addr = riscv_find_and_load_firmware(machine, firmware_name,
+                                                     start_addr, NULL);
 
     if (machine->kernel_filename) {
         kernel_start_addr = riscv_calc_kernel_start_addr(&s->soc.u_cpus,

hw/riscv/spike.c

@@ -190,6 +190,7 @@ static void spike_board_init(MachineState *machine)
     MemoryRegion *system_memory = get_system_memory();
     MemoryRegion *mask_rom = g_new(MemoryRegion, 1);
     target_ulong firmware_end_addr, kernel_start_addr;
+    const char *firmware_name;
     uint32_t fdt_load_addr;
     uint64_t kernel_entry;
     char *soc_name;
@@ -255,15 +256,10 @@ static void spike_board_init(MachineState *machine)
     memory_region_add_subregion(system_memory, memmap[SPIKE_MROM].base,
                                 mask_rom);
 
-    if (riscv_is_32bit(&s->soc[0])) {
-        firmware_end_addr = riscv_find_and_load_firmware(machine,
-                                    RISCV32_BIOS_BIN, memmap[SPIKE_DRAM].base,
-                                    htif_symbol_callback);
-    } else {
-        firmware_end_addr = riscv_find_and_load_firmware(machine,
-                                    RISCV64_BIOS_BIN, memmap[SPIKE_DRAM].base,
-                                    htif_symbol_callback);
-    }
+    firmware_name = riscv_default_firmware_name(&s->soc[0]);
+    firmware_end_addr = riscv_find_and_load_firmware(machine, firmware_name,
+                                                     memmap[SPIKE_DRAM].base,
+                                                     htif_symbol_callback);
 
     /* Load kernel */
     if (machine->kernel_filename) {

hw/riscv/virt.c

@@ -1237,6 +1237,7 @@ static void virt_machine_done(Notifier *notifier, void *data)
     MachineState *machine = MACHINE(s);
     target_ulong start_addr = memmap[VIRT_DRAM].base;
     target_ulong firmware_end_addr, kernel_start_addr;
+    const char *firmware_name = riscv_default_firmware_name(&s->soc[0]);
     uint32_t fdt_load_addr;
     uint64_t kernel_entry;
 
@@ -1256,13 +1257,8 @@ static void virt_machine_done(Notifier *notifier, void *data)
         }
     }
 
-    if (riscv_is_32bit(&s->soc[0])) {
-        firmware_end_addr = riscv_find_and_load_firmware(machine,
-                                    RISCV32_BIOS_BIN, start_addr, NULL);
-    } else {
-        firmware_end_addr = riscv_find_and_load_firmware(machine,
-                                    RISCV64_BIOS_BIN, start_addr, NULL);
-    }
+    firmware_end_addr = riscv_find_and_load_firmware(machine, firmware_name,
+                                                     start_addr, NULL);
 
     /*
      * Init fw_cfg.  Must be done before riscv_load_fdt, otherwise the device

include/hw/riscv/boot.h

@@ -37,6 +37,7 @@ target_ulong riscv_find_and_load_firmware(MachineState *machine,
                                           const char *default_machine_firmware,
                                           hwaddr firmware_load_addr,
                                           symbol_fn_t sym_cb);
+const char *riscv_default_firmware_name(RISCVHartArrayState *harts);
 target_ulong riscv_load_firmware(const char *firmware_filename,
                                  hwaddr firmware_load_addr,
                                  symbol_fn_t sym_cb);