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hw/mips/loongson3_virt: Emulate suspend function

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Suspend function is emulated as what hardware actually do.
Doorbell register fields are updates to include suspend value,
suspend vector is encoded in firmware blob and fw_cfg is updated
to include S3 bits as what x86 did.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Message-ID: <20240508-loongson3v-suspend-v1-1-186725524a39@flygoat.com>
[PMD: Use g_memdup2(), constify suspend array]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
This commit is contained in:
Jiaxun Yang 2024-05-08 10:31:09 +01:00 committed by Philippe Mathieu-Daudé
parent d804ad98f5
commit 5b1a3b9f8c
2 changed files with 21 additions and 0 deletions
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1
hw/mips/loongson3_bootp.c
View File

@ -148,4 +148,5 @@ void init_reset_system(struct efi_reset_system_t *reset)
reset->Shutdown = cpu_to_le64(0xffffffffbfc000a8);
reset->ResetCold = cpu_to_le64(0xffffffffbfc00080);
reset->ResetWarm = cpu_to_le64(0xffffffffbfc00080);
reset->DoSuspend = cpu_to_le64(0xffffffffbfc000d0);
}

20
hw/mips/loongson3_virt.c
View File

@ -127,6 +127,9 @@ static void loongson3_pm_write(void *opaque, hwaddr addr,
case 0x00:
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
return;
case 0x01:
qemu_system_suspend_request();
return;
case 0xff:
qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
return;
@ -250,6 +253,17 @@ static void init_boot_rom(void)
0x240D00FF, /* li t1, 0xff */
0xA18D0000, /* sb t1, (t0) */
0x1000FFFF, /* 1: b 1b */
0x00000000, /* nop */
/* Suspend */
0x3C0C9000, /* dli t0, 0x9000000010080010 */
0x358C0000,
0x000C6438,
0x358C1008,
0x000C6438,
0x358C0010,
0x240D0001, /* li t1, 0x01 */
0xA18D0000, /* sb t1, (t0) */
0x03e00008, /* jr ra */
0x00000000 /* nop */
};
@ -265,6 +279,7 @@ static void fw_cfg_boot_set(void *opaque, const char *boot_device,
static void fw_conf_init(unsigned long ram_size)
{
static const uint8_t suspend[6] = {128, 0, 0, 129, 128, 128};
FWCfgState *fw_cfg;
hwaddr cfg_addr = virt_memmap[VIRT_FW_CFG].base;
@ -274,6 +289,10 @@ static void fw_conf_init(unsigned long ram_size)
fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
fw_cfg_add_i32(fw_cfg, FW_CFG_MACHINE_VERSION, 1);
fw_cfg_add_i64(fw_cfg, FW_CFG_CPU_FREQ, get_cpu_freq_hz());
fw_cfg_add_file(fw_cfg, "etc/system-states",
g_memdup2(suspend, sizeof(suspend)), sizeof(suspend));
qemu_register_boot_set(fw_cfg_boot_set, fw_cfg);
}
@ -553,6 +572,7 @@ static void mips_loongson3_virt_init(MachineState *machine)
machine->ram, 0, virt_memmap[VIRT_LOWMEM].size);
memory_region_init_io(iomem, NULL, &loongson3_pm_ops,
NULL, "loongson3_pm", virt_memmap[VIRT_PM].size);
qemu_register_wakeup_support();
memory_region_add_subregion(address_space_mem,
virt_memmap[VIRT_LOWMEM].base, ram);