[Qemu-devel] [PATCH v7 5/7] target_arm: Parameterise the irq lines for armv7m_init

[Alistair Francis <alistair23@gmail.com>]

This patch allows the board to specifiy the number of NVIC interrupt
lines when using armv7m_init.

Signed-off-by: Alistair Francis <alistair23@gmail.com>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
---

 hw/arm/armv7m.c      | 7 ++++---
 hw/arm/stellaris.c   | 5 ++++-
 include/hw/arm/arm.h | 2 +-
 3 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c
index 50281f7..7169027 100644
--- a/hw/arm/armv7m.c
+++ b/hw/arm/armv7m.c
@@ -166,14 +166,14 @@ static void armv7m_reset(void *opaque)
    mem_size is in bytes.
    Returns the NVIC array.  */
 
-qemu_irq *armv7m_init(MemoryRegion *system_memory, int mem_size,
+qemu_irq *armv7m_init(MemoryRegion *system_memory, int mem_size, int num_irq,
                       const char *kernel_filename, const char *cpu_model)
 {
     ARMCPU *cpu;
     CPUARMState *env;
     DeviceState *nvic;
     /* FIXME: make this local state.  */
-    static qemu_irq pic[64];
+    qemu_irq *pic = g_new(qemu_irq, num_irq);
     int image_size;
     uint64_t entry;
     uint64_t lowaddr;
@@ -194,11 +194,12 @@ qemu_irq *armv7m_init(MemoryRegion *system_memory, int mem_size,
     armv7m_bitband_init();
 
     nvic = qdev_create(NULL, "armv7m_nvic");
+    qdev_prop_set_uint32(nvic, "num-irq", num_irq);
     env->nvic = nvic;
     qdev_init_nofail(nvic);
     sysbus_connect_irq(SYS_BUS_DEVICE(nvic), 0,
                        qdev_get_gpio_in(DEVICE(cpu), ARM_CPU_IRQ));
-    for (i = 0; i < 64; i++) {
+    for (i = 0; i < num_irq; i++) {
         pic[i] = qdev_get_gpio_in(nvic, i);
     }
 
diff --git a/hw/arm/stellaris.c b/hw/arm/stellaris.c
index d0c61c5..6fad10f 100644
--- a/hw/arm/stellaris.c
+++ b/hw/arm/stellaris.c
@@ -29,6 +29,8 @@
 #define BP_OLED_SSI  0x02
 #define BP_GAMEPAD   0x04
 
+#define NUM_IRQ_LINES 64
+
 typedef const struct {
     const char *name;
     uint32_t did0;
@@ -1239,7 +1241,8 @@ static void stellaris_init(const char *kernel_filename, const char *cpu_model,
     vmstate_register_ram_global(sram);
     memory_region_add_subregion(system_memory, 0x20000000, sram);
 
-    pic = armv7m_init(system_memory, flash_size, kernel_filename, cpu_model);
+    pic = armv7m_init(system_memory, flash_size, NUM_IRQ_LINES,
+                      kernel_filename, cpu_model);
 
     if (board->dc1 & (1 << 16)) {
         dev = sysbus_create_varargs(TYPE_STELLARIS_ADC, 0x40038000,
diff --git a/include/hw/arm/arm.h b/include/hw/arm/arm.h
index a112930..94e55a4 100644
--- a/include/hw/arm/arm.h
+++ b/include/hw/arm/arm.h
@@ -15,7 +15,7 @@
 #include "hw/irq.h"
 
 /* armv7m.c */
-qemu_irq *armv7m_init(MemoryRegion *system_memory, int mem_size,
+qemu_irq *armv7m_init(MemoryRegion *system_memory, int mem_size, int num_irq,
                       const char *kernel_filename, const char *cpu_model);
 
 /* arm_boot.c */
-- 
2.1.0