diff options
| author | Bin Meng <bin.meng@windriver.com> | 2020-06-08 07:17:38 -0700 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2020-06-19 08:25:27 -0700 |
| commit | 5133ed17906d1116c7ce47fd49ae77373cd41e29 (patch) | |
| tree | 4830dcf0ab92afdeeb8f91874ef543dee4485e0f /hw/riscv | |
| parent | 621c1006d2d82da9f266f21ad8e887c38769a11b (diff) | |
hw/riscv: sifive_u: Add reset functionality
The HiFive Unleashed board wires GPIO pin#10 to the input of the
system reset signal. Let's set up the GPIO pin#10 and insert a
"gpio-restart" device tree node so that reboot is now functional
with QEMU 'sifive_u' machine.
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 1591625864-31494-10-git-send-email-bmeng.cn@gmail.com
Message-Id: <1591625864-31494-10-git-send-email-bmeng.cn@gmail.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'hw/riscv')
| -rw-r--r-- | hw/riscv/sifive_u.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c index f6976a0d09..b9d2185c04 100644 --- a/hw/riscv/sifive_u.c +++ b/hw/riscv/sifive_u.c @@ -37,6 +37,7 @@ #include "qapi/error.h" #include "qapi/visitor.h" #include "hw/boards.h" +#include "hw/irq.h" #include "hw/loader.h" #include "hw/sysbus.h" #include "hw/char/serial.h" @@ -53,6 +54,7 @@ #include "net/eth.h" #include "sysemu/arch_init.h" #include "sysemu/device_tree.h" +#include "sysemu/runstate.h" #include "sysemu/sysemu.h" #include "exec/address-spaces.h" @@ -96,7 +98,7 @@ static void create_fdt(SiFiveUState *s, const struct MemmapEntry *memmap, uint32_t *cells; char *nodename; char ethclk_names[] = "pclk\0hclk"; - uint32_t plic_phandle, prci_phandle, phandle = 1; + uint32_t plic_phandle, prci_phandle, gpio_phandle, phandle = 1; uint32_t hfclk_phandle, rtcclk_phandle, phy_phandle; fdt = s->fdt = create_device_tree(&s->fdt_size); @@ -270,9 +272,11 @@ static void create_fdt(SiFiveUState *s, const struct MemmapEntry *memmap, g_free(cells); g_free(nodename); + gpio_phandle = phandle++; nodename = g_strdup_printf("/soc/gpio@%lx", (long)memmap[SIFIVE_U_GPIO].base); qemu_fdt_add_subnode(fdt, nodename); + qemu_fdt_setprop_cell(fdt, nodename, "phandle", gpio_phandle); qemu_fdt_setprop_cells(fdt, nodename, "clocks", prci_phandle, PRCI_CLK_TLCLK); qemu_fdt_setprop_cell(fdt, nodename, "#interrupt-cells", 2); @@ -292,6 +296,12 @@ static void create_fdt(SiFiveUState *s, const struct MemmapEntry *memmap, qemu_fdt_setprop_string(fdt, nodename, "compatible", "sifive,gpio0"); g_free(nodename); + nodename = g_strdup_printf("/gpio-restart"); + qemu_fdt_add_subnode(fdt, nodename); + qemu_fdt_setprop_cells(fdt, nodename, "gpios", gpio_phandle, 10, 1); + qemu_fdt_setprop_string(fdt, nodename, "compatible", "gpio-restart"); + g_free(nodename); + phy_phandle = phandle++; nodename = g_strdup_printf("/soc/ethernet@%lx", (long)memmap[SIFIVE_U_GEM].base); @@ -352,6 +362,14 @@ static void create_fdt(SiFiveUState *s, const struct MemmapEntry *memmap, g_free(nodename); } +static void sifive_u_machine_reset(void *opaque, int n, int level) +{ + /* gpio pin active low triggers reset */ + if (!level) { + qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); + } +} + static void sifive_u_machine_init(MachineState *machine) { const struct MemmapEntry *memmap = sifive_u_memmap; @@ -380,6 +398,10 @@ static void sifive_u_machine_init(MachineState *machine) memory_region_add_subregion(system_memory, memmap[SIFIVE_U_FLASH0].base, flash0); + /* register gpio-restart */ + qdev_connect_gpio_out(DEVICE(&(s->soc.gpio)), 10, + qemu_allocate_irq(sifive_u_machine_reset, NULL, 0)); + /* create device tree */ create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline); |