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ARM: Virt: Add a GPIO controller

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ACPI 5.0 supports GPIO-signaled ACPI Events. This can be used for
powerdown, hotplug evnets. Add a GPIO controller in machine virt,
to support powerdown, maybe can be used for cpu hotplug. And
here we use pl061.

Signed-off-by: Shannon Zhao <zhaoshenglong@huawei.com>
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: Wei Huang <wei@redhat.com>
Tested-by: Wei Huang <wei@redhat.com>
Message-id: 1449804086-3464-4-git-send-email-zhaoshenglong@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Shannon Zhao 2015-12-17 13:37:13 +00:00 committed by Peter Maydell
parent 45fcf53940
commit b0a3721e44
2 changed files with 31 additions and 0 deletions
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30
hw/arm/virt.c
View File

@ -120,6 +120,7 @@ static const MemMapEntry a15memmap[] = {
[VIRT_UART] = { 0x09000000, 0x00001000 },
[VIRT_RTC] = { 0x09010000, 0x00001000 },
[VIRT_FW_CFG] = { 0x09020000, 0x00000018 },
[VIRT_GPIO] = { 0x09030000, 0x00001000 },
[VIRT_MMIO] = { 0x0a000000, 0x00000200 },
/* ...repeating for a total of NUM_VIRTIO_TRANSPORTS, each of that size */
[VIRT_PLATFORM_BUS] = { 0x0c000000, 0x02000000 },
@ -135,6 +136,7 @@ static const int a15irqmap[] = {
[VIRT_UART] = 1,
[VIRT_RTC] = 2,
[VIRT_PCIE] = 3, /* ... to 6 */
[VIRT_GPIO] = 7,
[VIRT_MMIO] = 16, /* ...to 16 + NUM_VIRTIO_TRANSPORTS - 1 */
[VIRT_GIC_V2M] = 48, /* ...to 48 + NUM_GICV2M_SPIS - 1 */
[VIRT_PLATFORM_BUS] = 112, /* ...to 112 + PLATFORM_BUS_NUM_IRQS -1 */
@ -538,6 +540,32 @@ static void create_rtc(const VirtBoardInfo *vbi, qemu_irq *pic)
g_free(nodename);
}
static void create_gpio(const VirtBoardInfo *vbi, qemu_irq *pic)
{
char *nodename;
hwaddr base = vbi->memmap[VIRT_GPIO].base;
hwaddr size = vbi->memmap[VIRT_GPIO].size;
int irq = vbi->irqmap[VIRT_GPIO];
const char compat[] = "arm,pl061\0arm,primecell";
sysbus_create_simple("pl061", base, pic[irq]);
nodename = g_strdup_printf("/pl061@%" PRIx64, base);
qemu_fdt_add_subnode(vbi->fdt, nodename);
qemu_fdt_setprop_sized_cells(vbi->fdt, nodename, "reg",
2, base, 2, size);
qemu_fdt_setprop(vbi->fdt, nodename, "compatible", compat, sizeof(compat));
qemu_fdt_setprop_cell(vbi->fdt, nodename, "#gpio-cells", 2);
qemu_fdt_setprop(vbi->fdt, nodename, "gpio-controller", NULL, 0);
qemu_fdt_setprop_cells(vbi->fdt, nodename, "interrupts",
GIC_FDT_IRQ_TYPE_SPI, irq,
GIC_FDT_IRQ_FLAGS_LEVEL_HI);
qemu_fdt_setprop_cell(vbi->fdt, nodename, "clocks", vbi->clock_phandle);
qemu_fdt_setprop_string(vbi->fdt, nodename, "clock-names", "apb_pclk");
g_free(nodename);
}
static void create_virtio_devices(const VirtBoardInfo *vbi, qemu_irq *pic)
{
int i;
@ -1041,6 +1069,8 @@ static void machvirt_init(MachineState *machine)
create_pcie(vbi, pic, vms->highmem);
create_gpio(vbi, pic);
/* Create mmio transports, so the user can create virtio backends
* (which will be automatically plugged in to the transports). If
* no backend is created the transport will just sit harmlessly idle.

1
include/hw/arm/virt.h
View File

@ -59,6 +59,7 @@ enum {
VIRT_PCIE_ECAM,
VIRT_PLATFORM_BUS,
VIRT_PCIE_MMIO_HIGH,
VIRT_GPIO,
};
typedef struct MemMapEntry {