[Qemu-devel] [PATCH v1 1/4] hw: Add support for loading ARMv7-M applications via -kernel

[Meador Inge]

The minimal amount of arm_boot_info has been setup to allow
for machines based off of ARMv7-M processors to be loaded via the
-kernel option.

Signed-off-by: Meador Inge <address@hidden>
---
 hw/armv7m.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/hw/armv7m.c b/hw/armv7m.c
index 9f66667..d11be09 100644
--- a/hw/armv7m.c
+++ b/hw/armv7m.c
@@ -150,10 +150,16 @@ static void armv7m_bitband_init(void)
 static void armv7m_reset(void *opaque)
 {
     ARMCPU *cpu = opaque;
+    CPUARMState *env = &cpu->env;
+    const struct arm_boot_info *info = env->boot_info;
 
     cpu_reset(CPU(cpu));
+    env->regs[15] = info->entry & 0xfffffffe;
+    env->thumb = info->entry & 1;
 }
 
+static struct arm_boot_info armv7m_binfo;
+
 /* Init CPU and memory for a v7-M based board.
    flash_size and sram_size are in kb.
    Returns the NVIC array.  */
@@ -232,10 +238,16 @@ qemu_irq *armv7m_init(MemoryRegion *address_space_mem,
         exit(1);
     }
 
+    armv7m_binfo.ram_size = sram_size;
+    armv7m_binfo.kernel_filename = kernel_filename;
+    armv7m_binfo.kernel_cmdline = "";
+    env->boot_info = &armv7m_binfo;
+
     image_size = load_elf(kernel_filename, NULL, NULL, &entry, &lowaddr,
                           NULL, big_endian, ELF_MACHINE, 1);
     if (image_size < 0) {
         image_size = load_image_targphys(kernel_filename, 0, flash_size);
+        entry = 0;
        lowaddr = 0;
     }
     if (image_size < 0) {
@@ -243,6 +255,7 @@ qemu_irq *armv7m_init(MemoryRegion *address_space_mem,
                 kernel_filename);
         exit(1);
     }
+    armv7m_binfo.entry = entry;
 
     /* Hack to map an additional page of ram at the top of the address
        space.  This stops qemu complaining about executing code outside RAM
-- 
1.7.7.6