target/arm: Make boards pass base address to armv7m_load_kernel()

Currently armv7m_load_kernel() takes the size of the block of memory
where it should load the initial guest image, but assumes that it
should always load it at address 0.  This happens to be true of all
our M-profile boards at the moment, but it isn't guaranteed to always
be so: M-profile CPUs can be configured (via init-svtor and
init-nsvtor, which match equivalent hardware configuration signals)
to have the initial vector table at any address, not just zero.  (For
instance the Teeny board has the boot ROM at address 0x0200_0000.)

Add a base address argument to armv7m_load_kernel(), so that
callers now pass in both base address and size. All the current
callers pass 0, so this is not a behaviour change.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220823160417.3858216-3-peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c
index fa4c2c7..50a9507 100644 (file)
--- a/hw/arm/armv7m.c
+++ b/hw/arm/armv7m.c
@@ -568,7 +568,8 @@ static void armv7m_reset(void *opaque)
     cpu_reset(CPU(cpu));
 }
 
-void armv7m_load_kernel(ARMCPU *cpu, const char *kernel_filename, int mem_size)
+void armv7m_load_kernel(ARMCPU *cpu, const char *kernel_filename,
+                        hwaddr mem_base, int mem_size)
 {
     ssize_t image_size;
     uint64_t entry;
@@ -588,7 +589,7 @@ void armv7m_load_kernel(ARMCPU *cpu, const char *kernel_filename, int mem_size)
                                  &entry, NULL, NULL,
                                  NULL, 0, EM_ARM, 1, 0, as);
         if (image_size < 0) {
-            image_size = load_image_targphys_as(kernel_filename, 0,
+            image_size = load_image_targphys_as(kernel_filename, mem_base,
                                                 mem_size, as);
         }
         if (image_size < 0) {

diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
index b3bbe06..bc3ecdb 100644 (file)
--- a/hw/arm/aspeed.c
+++ b/hw/arm/aspeed.c
@@ -1430,6 +1430,7 @@ static void aspeed_minibmc_machine_init(MachineState *machine)
 
     armv7m_load_kernel(ARM_CPU(first_cpu),
                        machine->kernel_filename,
+                       0,
                        AST1030_INTERNAL_FLASH_SIZE);
 }
 

diff --git a/hw/arm/microbit.c b/hw/arm/microbit.c
index e949433..50df362 100644 (file)
--- a/hw/arm/microbit.c
+++ b/hw/arm/microbit.c
@@ -57,7 +57,7 @@ static void microbit_init(MachineState *machine)
                                         mr, -1);
 
     armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
-                       s->nrf51.flash_size);
+                       0, s->nrf51.flash_size);
 }
 
 static void microbit_machine_class_init(ObjectClass *oc, void *data)

diff --git a/hw/arm/mps2-tz.c b/hw/arm/mps2-tz.c
index 4017392..394192b 100644 (file)
--- a/hw/arm/mps2-tz.c
+++ b/hw/arm/mps2-tz.c
@@ -1197,7 +1197,7 @@ static void mps2tz_common_init(MachineState *machine)
     }
 
     armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
-                       boot_ram_size(mms));
+                       0, boot_ram_size(mms));
 }
 
 static void mps2_tz_idau_check(IDAUInterface *ii, uint32_t address,

diff --git a/hw/arm/mps2.c b/hw/arm/mps2.c
index bb76fa6..a86a994 100644 (file)
--- a/hw/arm/mps2.c
+++ b/hw/arm/mps2.c
@@ -450,7 +450,7 @@ static void mps2_common_init(MachineState *machine)
                                   mmc->fpga_type == FPGA_AN511 ? 47 : 13));
 
     armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
-                       0x400000);
+                       0, 0x400000);
 }
 
 static void mps2_class_init(ObjectClass *oc, void *data)

diff --git a/hw/arm/msf2-som.c b/hw/arm/msf2-som.c
index d9f8816..a6df473 100644 (file)
--- a/hw/arm/msf2-som.c
+++ b/hw/arm/msf2-som.c
@@ -98,7 +98,7 @@ static void emcraft_sf2_s2s010_init(MachineState *machine)
     sysbus_connect_irq(SYS_BUS_DEVICE(&soc->spi[0]), 1, cs_line);
 
     armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
-                       soc->envm_size);
+                       0, soc->envm_size);
 }
 
 static void emcraft_sf2_machine_init(MachineClass *mc)

diff --git a/hw/arm/musca.c b/hw/arm/musca.c
index 7a83f7d..6eeee57 100644 (file)
--- a/hw/arm/musca.c
+++ b/hw/arm/musca.c
@@ -597,7 +597,8 @@ static void musca_init(MachineState *machine)
                                                      "cfg_sec_resp", 0));
     }
 
-    armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename, 0x2000000);
+    armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
+                       0, 0x2000000);
 }
 
 static void musca_class_init(ObjectClass *oc, void *data)

diff --git a/hw/arm/netduino2.c b/hw/arm/netduino2.c
index 3365da1..83753d5 100644 (file)
--- a/hw/arm/netduino2.c
+++ b/hw/arm/netduino2.c
@@ -49,7 +49,7 @@ static void netduino2_init(MachineState *machine)
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 
     armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
-                       FLASH_SIZE);
+                       0, FLASH_SIZE);
 }
 
 static void netduino2_machine_init(MachineClass *mc)

diff --git a/hw/arm/netduinoplus2.c b/hw/arm/netduinoplus2.c
index 76cea8e..515c081 100644 (file)
--- a/hw/arm/netduinoplus2.c
+++ b/hw/arm/netduinoplus2.c
@@ -50,7 +50,7 @@ static void netduinoplus2_init(MachineState *machine)
 
     armv7m_load_kernel(ARM_CPU(first_cpu),
                        machine->kernel_filename,
-                       FLASH_SIZE);
+                       0, FLASH_SIZE);
 }
 
 static void netduinoplus2_machine_init(MachineClass *mc)

diff --git a/hw/arm/stellaris.c b/hw/arm/stellaris.c
index 12c673c..a9e96c3 100644 (file)
--- a/hw/arm/stellaris.c
+++ b/hw/arm/stellaris.c
@@ -1302,7 +1302,7 @@ static void stellaris_init(MachineState *ms, stellaris_board_info *board)
     create_unimplemented_device("hibernation", 0x400fc000, 0x1000);
     create_unimplemented_device("flash-control", 0x400fd000, 0x1000);
 
-    armv7m_load_kernel(ARM_CPU(first_cpu), ms->kernel_filename, flash_size);
+    armv7m_load_kernel(ARM_CPU(first_cpu), ms->kernel_filename, 0, flash_size);
 }
 
 /* FIXME: Figure out how to generate these from stellaris_boards.  */

diff --git a/hw/arm/stm32vldiscovery.c b/hw/arm/stm32vldiscovery.c
index 04036da..67675e9 100644 (file)
--- a/hw/arm/stm32vldiscovery.c
+++ b/hw/arm/stm32vldiscovery.c
@@ -53,7 +53,7 @@ static void stm32vldiscovery_init(MachineState *machine)
 
     armv7m_load_kernel(ARM_CPU(first_cpu),
                        machine->kernel_filename,
-                       FLASH_SIZE);
+                       0, FLASH_SIZE);
 }
 
 static void stm32vldiscovery_machine_init(MachineClass *mc)

diff --git a/include/hw/arm/boot.h b/include/hw/arm/boot.h
index c7ebae1..f18cc30 100644 (file)
--- a/include/hw/arm/boot.h
+++ b/include/hw/arm/boot.h
@@ -25,13 +25,16 @@ typedef enum {
  * armv7m_load_kernel:
  * @cpu: CPU
  * @kernel_filename: file to load
+ * @mem_base: base address to load image at (should be where the
+ *            CPU expects to find its vector table on reset)
  * @mem_size: mem_size: maximum image size to load
  *
  * Load the guest image for an ARMv7M system. This must be called by
  * any ARMv7M board. (This is necessary to ensure that the CPU resets
  * correctly on system reset, as well as for kernel loading.)
  */
-void armv7m_load_kernel(ARMCPU *cpu, const char *kernel_filename, int mem_size);
+void armv7m_load_kernel(ARMCPU *cpu, const char *kernel_filename,
+                        hwaddr mem_base, int mem_size);
 
 /* arm_boot.c */
 struct arm_boot_info {