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riscv: virt: Use Goldfish RTC device 

We extend QEMU RISC-V virt machine by adding Goldfish RTC device
to it. This will allow Guest Linux to sync it's local date/time
with Host date/time via RTC device.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Acked-by: Palmer Dabbelt <palmer@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
This commit is contained in:
Anup Patel 2019-11-06 11:56:43 +00:00 committed by Palmer Dabbelt
parent 9a5b40b842
commit 67b5ef3049
No known key found for this signature in database
GPG Key ID: 2E1319F35FBB1889
3 changed files with 19 additions and 0 deletions
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1
hw/riscv/Kconfig
View File

@ -34,6 +34,7 @@ config RISCV_VIRT
select PCI
select HART
select SERIAL
select GOLDFISH_RTC
select VIRTIO_MMIO
select PCI_EXPRESS_GENERIC_BRIDGE
select PFLASH_CFI01

16
hw/riscv/virt.c
View File

@ -58,6 +58,7 @@ static const struct MemmapEntry {
[VIRT_DEBUG] = { 0x0, 0x100 },
[VIRT_MROM] = { 0x1000, 0x11000 },
[VIRT_TEST] = { 0x100000, 0x1000 },
[VIRT_RTC] = { 0x101000, 0x1000 },
[VIRT_CLINT] = { 0x2000000, 0x10000 },
[VIRT_PLIC] = { 0xc000000, 0x4000000 },
[VIRT_UART0] = { 0x10000000, 0x100 },
@ -404,6 +405,18 @@ static void create_fdt(RISCVVirtState *s, const struct MemmapEntry *memmap,
}
g_free(nodename);
nodename = g_strdup_printf("/rtc@%lx",
(long)memmap[VIRT_RTC].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_string(fdt, nodename, "compatible",
"google,goldfish-rtc");
qemu_fdt_setprop_cells(fdt, nodename, "reg",
0x0, memmap[VIRT_RTC].base,
0x0, memmap[VIRT_RTC].size);
qemu_fdt_setprop_cell(fdt, nodename, "interrupt-parent", plic_phandle);
qemu_fdt_setprop_cell(fdt, nodename, "interrupts", RTC_IRQ);
g_free(nodename);
nodename = g_strdup_printf("/flash@%" PRIx64, flashbase);
qemu_fdt_add_subnode(s->fdt, nodename);
qemu_fdt_setprop_string(s->fdt, nodename, "compatible", "cfi-flash");
@ -601,6 +614,9 @@ static void riscv_virt_board_init(MachineState *machine)
0, qdev_get_gpio_in(DEVICE(s->plic), UART0_IRQ), 399193,
serial_hd(0), DEVICE_LITTLE_ENDIAN);
sysbus_create_simple("goldfish_rtc", memmap[VIRT_RTC].base,
qdev_get_gpio_in(DEVICE(s->plic), RTC_IRQ));
virt_flash_create(s);
for (i = 0; i < ARRAY_SIZE(s->flash); i++) {

2
include/hw/riscv/virt.h
View File

@ -44,6 +44,7 @@ enum {
VIRT_DEBUG,
VIRT_MROM,
VIRT_TEST,
VIRT_RTC,
VIRT_CLINT,
VIRT_PLIC,
VIRT_UART0,
@ -57,6 +58,7 @@ enum {
enum {
UART0_IRQ = 10,
RTC_IRQ = 11,
VIRTIO_IRQ = 1, /* 1 to 8 */
VIRTIO_COUNT = 8,
PCIE_IRQ = 0x20, /* 32 to 35 */