[v2,1/3] hw/riscv: Add optional symbol callback ptr to riscv_load_firmware()

Commit Message

Anup Patel March 3, 2020, 2 p.m. UTC

This patch adds an optional function pointer, "sym_cb", to
riscv_load_firmware() which provides the possibility to access
the symbol table during kernel loading.

The pointer is ignored, if supplied with flat (non-elf) firmware image.

The Spike board requires it locate the HTIF symbols from firmware ELF
passed via "-bios" option.

Signed-off-by: Anup Patel <[e-mail]>
---
 hw/riscv/boot.c         | 13 ++++++++-----
 hw/riscv/sifive_u.c     |  2 +-
 hw/riscv/virt.c         |  2 +-
 include/hw/riscv/boot.h |  6 ++++--
 4 files changed, 14 insertions(+), 9 deletions(-)

Patch

diff --git a/hw/riscv/boot.c b/hw/riscv/boot.c
index b8e765277d..726300a171 100644
--- a/hw/riscv/boot.c
+++ b/hw/riscv/boot.c
@@ -36,7 +36,8 @@ 
 
 void riscv_find_and_load_firmware(MachineState *machine,
                                   const char *default_machine_firmware,
-                                  hwaddr firmware_load_addr)
+                                  hwaddr firmware_load_addr,
+                                  symbol_fn_t sym_cb)
 {
     char *firmware_filename = NULL;
 
@@ -76,7 +77,7 @@  void riscv_find_and_load_firmware(MachineState *machine,
 
     if (firmware_filename) {
         /* If not "none" load the firmware */
-        riscv_load_firmware(firmware_filename, firmware_load_addr);
+        riscv_load_firmware(firmware_filename, firmware_load_addr, sym_cb);
         g_free(firmware_filename);
     }
 }
@@ -96,12 +97,14 @@  char *riscv_find_firmware(const char *firmware_filename)
 }
 
 target_ulong riscv_load_firmware(const char *firmware_filename,
-                                 hwaddr firmware_load_addr)
+                                 hwaddr firmware_load_addr,
+                                 symbol_fn_t sym_cb)
 {
     uint64_t firmware_entry, firmware_start, firmware_end;
 
-    if (load_elf(firmware_filename, NULL, NULL, NULL, &firmware_entry,
-                 &firmware_start, &firmware_end, NULL, 0, EM_RISCV, 1, 0) > 0) {
+    if (load_elf_ram_sym(firmware_filename, NULL, NULL, NULL,
+                         &firmware_entry, &firmware_start, &firmware_end, NULL,
+                         0, EM_RISCV, 1, 0, NULL, true, sym_cb) > 0) {
         return firmware_entry;
     }
 
diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c
index 156a003642..0ef9fc0fd0 100644
--- a/hw/riscv/sifive_u.c
+++ b/hw/riscv/sifive_u.c
@@ -341,7 +341,7 @@  static void riscv_sifive_u_init(MachineState *machine)
     create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline);
 
     riscv_find_and_load_firmware(machine, BIOS_FILENAME,
-                                 memmap[SIFIVE_U_DRAM].base);
+                                 memmap[SIFIVE_U_DRAM].base, NULL);
 
     if (machine->kernel_filename) {
         uint64_t kernel_entry = riscv_load_kernel(machine->kernel_filename,
diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 85ec9e22aa..24f851e895 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -507,7 +507,7 @@  static void riscv_virt_board_init(MachineState *machine)
                                 mask_rom);
 
     riscv_find_and_load_firmware(machine, BIOS_FILENAME,
-                                 memmap[VIRT_DRAM].base);
+                                 memmap[VIRT_DRAM].base, NULL);
 
     if (machine->kernel_filename) {
         uint64_t kernel_entry = riscv_load_kernel(machine->kernel_filename,
diff --git a/include/hw/riscv/boot.h b/include/hw/riscv/boot.h
index df80051fbc..474a940ad5 100644
--- a/include/hw/riscv/boot.h
+++ b/include/hw/riscv/boot.h
@@ -24,10 +24,12 @@ 
 
 void riscv_find_and_load_firmware(MachineState *machine,
                                   const char *default_machine_firmware,
-                                  hwaddr firmware_load_addr);
+                                  hwaddr firmware_load_addr,
+                                  symbol_fn_t sym_cb);
 char *riscv_find_firmware(const char *firmware_filename);
 target_ulong riscv_load_firmware(const char *firmware_filename,
-                                 hwaddr firmware_load_addr);
+                                 hwaddr firmware_load_addr,
+                                 symbol_fn_t sym_cb);
 target_ulong riscv_load_kernel(const char *kernel_filename,
                                symbol_fn_t sym_cb);
 hwaddr riscv_load_initrd(const char *filename, uint64_t mem_size,