| /* |
| * Status and system control registers for ARM RealView/Versatile boards. |
| * |
| * Copyright (c) 2006-2007 CodeSourcery. |
| * Written by Paul Brook |
| * |
| * This code is licensed under the GPL. |
| */ |
| |
| #include "hw.h" |
| #include "qemu-timer.h" |
| #include "sysbus.h" |
| #include "primecell.h" |
| #include "sysemu.h" |
| |
| #define LOCK_VALUE 0xa05f |
| |
| typedef struct { |
| SysBusDevice busdev; |
| MemoryRegion iomem; |
| qemu_irq pl110_mux_ctrl; |
| |
| uint32_t sys_id; |
| uint32_t leds; |
| uint16_t lockval; |
| uint32_t cfgdata1; |
| uint32_t cfgdata2; |
| uint32_t flags; |
| uint32_t nvflags; |
| uint32_t resetlevel; |
| uint32_t proc_id; |
| uint32_t sys_mci; |
| uint32_t sys_cfgdata; |
| uint32_t sys_cfgctrl; |
| uint32_t sys_cfgstat; |
| uint32_t sys_clcd; |
| } arm_sysctl_state; |
| |
| static const VMStateDescription vmstate_arm_sysctl = { |
| .name = "realview_sysctl", |
| .version_id = 3, |
| .minimum_version_id = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(leds, arm_sysctl_state), |
| VMSTATE_UINT16(lockval, arm_sysctl_state), |
| VMSTATE_UINT32(cfgdata1, arm_sysctl_state), |
| VMSTATE_UINT32(cfgdata2, arm_sysctl_state), |
| VMSTATE_UINT32(flags, arm_sysctl_state), |
| VMSTATE_UINT32(nvflags, arm_sysctl_state), |
| VMSTATE_UINT32(resetlevel, arm_sysctl_state), |
| VMSTATE_UINT32_V(sys_mci, arm_sysctl_state, 2), |
| VMSTATE_UINT32_V(sys_cfgdata, arm_sysctl_state, 2), |
| VMSTATE_UINT32_V(sys_cfgctrl, arm_sysctl_state, 2), |
| VMSTATE_UINT32_V(sys_cfgstat, arm_sysctl_state, 2), |
| VMSTATE_UINT32_V(sys_clcd, arm_sysctl_state, 3), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| /* The PB926 actually uses a different format for |
| * its SYS_ID register. Fortunately the bits which are |
| * board type on later boards are distinct. |
| */ |
| #define BOARD_ID_PB926 0x100 |
| #define BOARD_ID_EB 0x140 |
| #define BOARD_ID_PBA8 0x178 |
| #define BOARD_ID_PBX 0x182 |
| #define BOARD_ID_VEXPRESS 0x190 |
| |
| static int board_id(arm_sysctl_state *s) |
| { |
| /* Extract the board ID field from the SYS_ID register value */ |
| return (s->sys_id >> 16) & 0xfff; |
| } |
| |
| static void arm_sysctl_reset(DeviceState *d) |
| { |
| arm_sysctl_state *s = FROM_SYSBUS(arm_sysctl_state, sysbus_from_qdev(d)); |
| |
| s->leds = 0; |
| s->lockval = 0; |
| s->cfgdata1 = 0; |
| s->cfgdata2 = 0; |
| s->flags = 0; |
| s->resetlevel = 0; |
| if (board_id(s) == BOARD_ID_VEXPRESS) { |
| /* On VExpress this register will RAZ/WI */ |
| s->sys_clcd = 0; |
| } else { |
| /* All others: CLCDID 0x1f, indicating VGA */ |
| s->sys_clcd = 0x1f00; |
| } |
| } |
| |
| static uint64_t arm_sysctl_read(void *opaque, target_phys_addr_t offset, |
| unsigned size) |
| { |
| arm_sysctl_state *s = (arm_sysctl_state *)opaque; |
| |
| switch (offset) { |
| case 0x00: /* ID */ |
| return s->sys_id; |
| case 0x04: /* SW */ |
| /* General purpose hardware switches. |
| We don't have a useful way of exposing these to the user. */ |
| return 0; |
| case 0x08: /* LED */ |
| return s->leds; |
| case 0x20: /* LOCK */ |
| return s->lockval; |
| case 0x0c: /* OSC0 */ |
| case 0x10: /* OSC1 */ |
| case 0x14: /* OSC2 */ |
| case 0x18: /* OSC3 */ |
| case 0x1c: /* OSC4 */ |
| case 0x24: /* 100HZ */ |
| /* ??? Implement these. */ |
| return 0; |
| case 0x28: /* CFGDATA1 */ |
| return s->cfgdata1; |
| case 0x2c: /* CFGDATA2 */ |
| return s->cfgdata2; |
| case 0x30: /* FLAGS */ |
| return s->flags; |
| case 0x38: /* NVFLAGS */ |
| return s->nvflags; |
| case 0x40: /* RESETCTL */ |
| if (board_id(s) == BOARD_ID_VEXPRESS) { |
| /* reserved: RAZ/WI */ |
| return 0; |
| } |
| return s->resetlevel; |
| case 0x44: /* PCICTL */ |
| return 1; |
| case 0x48: /* MCI */ |
| return s->sys_mci; |
| case 0x4c: /* FLASH */ |
| return 0; |
| case 0x50: /* CLCD */ |
| return s->sys_clcd; |
| case 0x54: /* CLCDSER */ |
| return 0; |
| case 0x58: /* BOOTCS */ |
| return 0; |
| case 0x5c: /* 24MHz */ |
| return muldiv64(qemu_get_clock_ns(vm_clock), 24000000, get_ticks_per_sec()); |
| case 0x60: /* MISC */ |
| return 0; |
| case 0x84: /* PROCID0 */ |
| return s->proc_id; |
| case 0x88: /* PROCID1 */ |
| return 0xff000000; |
| case 0x64: /* DMAPSR0 */ |
| case 0x68: /* DMAPSR1 */ |
| case 0x6c: /* DMAPSR2 */ |
| case 0x70: /* IOSEL */ |
| case 0x74: /* PLDCTL */ |
| case 0x80: /* BUSID */ |
| case 0x8c: /* OSCRESET0 */ |
| case 0x90: /* OSCRESET1 */ |
| case 0x94: /* OSCRESET2 */ |
| case 0x98: /* OSCRESET3 */ |
| case 0x9c: /* OSCRESET4 */ |
| case 0xc0: /* SYS_TEST_OSC0 */ |
| case 0xc4: /* SYS_TEST_OSC1 */ |
| case 0xc8: /* SYS_TEST_OSC2 */ |
| case 0xcc: /* SYS_TEST_OSC3 */ |
| case 0xd0: /* SYS_TEST_OSC4 */ |
| return 0; |
| case 0xa0: /* SYS_CFGDATA */ |
| if (board_id(s) != BOARD_ID_VEXPRESS) { |
| goto bad_reg; |
| } |
| return s->sys_cfgdata; |
| case 0xa4: /* SYS_CFGCTRL */ |
| if (board_id(s) != BOARD_ID_VEXPRESS) { |
| goto bad_reg; |
| } |
| return s->sys_cfgctrl; |
| case 0xa8: /* SYS_CFGSTAT */ |
| if (board_id(s) != BOARD_ID_VEXPRESS) { |
| goto bad_reg; |
| } |
| return s->sys_cfgstat; |
| default: |
| bad_reg: |
| printf ("arm_sysctl_read: Bad register offset 0x%x\n", (int)offset); |
| return 0; |
| } |
| } |
| |
| static void arm_sysctl_write(void *opaque, target_phys_addr_t offset, |
| uint64_t val, unsigned size) |
| { |
| arm_sysctl_state *s = (arm_sysctl_state *)opaque; |
| |
| switch (offset) { |
| case 0x08: /* LED */ |
| s->leds = val; |
| case 0x0c: /* OSC0 */ |
| case 0x10: /* OSC1 */ |
| case 0x14: /* OSC2 */ |
| case 0x18: /* OSC3 */ |
| case 0x1c: /* OSC4 */ |
| /* ??? */ |
| break; |
| case 0x20: /* LOCK */ |
| if (val == LOCK_VALUE) |
| s->lockval = val; |
| else |
| s->lockval = val & 0x7fff; |
| break; |
| case 0x28: /* CFGDATA1 */ |
| /* ??? Need to implement this. */ |
| s->cfgdata1 = val; |
| break; |
| case 0x2c: /* CFGDATA2 */ |
| /* ??? Need to implement this. */ |
| s->cfgdata2 = val; |
| break; |
| case 0x30: /* FLAGSSET */ |
| s->flags |= val; |
| break; |
| case 0x34: /* FLAGSCLR */ |
| s->flags &= ~val; |
| break; |
| case 0x38: /* NVFLAGSSET */ |
| s->nvflags |= val; |
| break; |
| case 0x3c: /* NVFLAGSCLR */ |
| s->nvflags &= ~val; |
| break; |
| case 0x40: /* RESETCTL */ |
| if (board_id(s) == BOARD_ID_VEXPRESS) { |
| /* reserved: RAZ/WI */ |
| break; |
| } |
| if (s->lockval == LOCK_VALUE) { |
| s->resetlevel = val; |
| if (val & 0x100) |
| qemu_system_reset_request (); |
| } |
| break; |
| case 0x44: /* PCICTL */ |
| /* nothing to do. */ |
| break; |
| case 0x4c: /* FLASH */ |
| break; |
| case 0x50: /* CLCD */ |
| switch (board_id(s)) { |
| case BOARD_ID_PB926: |
| /* On 926 bits 13:8 are R/O, bits 1:0 control |
| * the mux that defines how to interpret the PL110 |
| * graphics format, and other bits are r/w but we |
| * don't implement them to do anything. |
| */ |
| s->sys_clcd &= 0x3f00; |
| s->sys_clcd |= val & ~0x3f00; |
| qemu_set_irq(s->pl110_mux_ctrl, val & 3); |
| break; |
| case BOARD_ID_EB: |
| /* The EB is the same except that there is no mux since |
| * the EB has a PL111. |
| */ |
| s->sys_clcd &= 0x3f00; |
| s->sys_clcd |= val & ~0x3f00; |
| break; |
| case BOARD_ID_PBA8: |
| case BOARD_ID_PBX: |
| /* On PBA8 and PBX bit 7 is r/w and all other bits |
| * are either r/o or RAZ/WI. |
| */ |
| s->sys_clcd &= (1 << 7); |
| s->sys_clcd |= val & ~(1 << 7); |
| break; |
| case BOARD_ID_VEXPRESS: |
| default: |
| /* On VExpress this register is unimplemented and will RAZ/WI */ |
| break; |
| } |
| case 0x54: /* CLCDSER */ |
| case 0x64: /* DMAPSR0 */ |
| case 0x68: /* DMAPSR1 */ |
| case 0x6c: /* DMAPSR2 */ |
| case 0x70: /* IOSEL */ |
| case 0x74: /* PLDCTL */ |
| case 0x80: /* BUSID */ |
| case 0x84: /* PROCID0 */ |
| case 0x88: /* PROCID1 */ |
| case 0x8c: /* OSCRESET0 */ |
| case 0x90: /* OSCRESET1 */ |
| case 0x94: /* OSCRESET2 */ |
| case 0x98: /* OSCRESET3 */ |
| case 0x9c: /* OSCRESET4 */ |
| break; |
| case 0xa0: /* SYS_CFGDATA */ |
| if (board_id(s) != BOARD_ID_VEXPRESS) { |
| goto bad_reg; |
| } |
| s->sys_cfgdata = val; |
| return; |
| case 0xa4: /* SYS_CFGCTRL */ |
| if (board_id(s) != BOARD_ID_VEXPRESS) { |
| goto bad_reg; |
| } |
| s->sys_cfgctrl = val & ~(3 << 18); |
| s->sys_cfgstat = 1; /* complete */ |
| switch (s->sys_cfgctrl) { |
| case 0xc0800000: /* SYS_CFG_SHUTDOWN to motherboard */ |
| qemu_system_shutdown_request(); |
| break; |
| case 0xc0900000: /* SYS_CFG_REBOOT to motherboard */ |
| qemu_system_reset_request(); |
| break; |
| default: |
| s->sys_cfgstat |= 2; /* error */ |
| } |
| return; |
| case 0xa8: /* SYS_CFGSTAT */ |
| if (board_id(s) != BOARD_ID_VEXPRESS) { |
| goto bad_reg; |
| } |
| s->sys_cfgstat = val & 3; |
| return; |
| default: |
| bad_reg: |
| printf ("arm_sysctl_write: Bad register offset 0x%x\n", (int)offset); |
| return; |
| } |
| } |
| |
| static const MemoryRegionOps arm_sysctl_ops = { |
| .read = arm_sysctl_read, |
| .write = arm_sysctl_write, |
| .endianness = DEVICE_NATIVE_ENDIAN, |
| }; |
| |
| static void arm_sysctl_gpio_set(void *opaque, int line, int level) |
| { |
| arm_sysctl_state *s = (arm_sysctl_state *)opaque; |
| switch (line) { |
| case ARM_SYSCTL_GPIO_MMC_WPROT: |
| { |
| /* For PB926 and EB write-protect is bit 2 of SYS_MCI; |
| * for all later boards it is bit 1. |
| */ |
| int bit = 2; |
| if ((board_id(s) == BOARD_ID_PB926) || (board_id(s) == BOARD_ID_EB)) { |
| bit = 4; |
| } |
| s->sys_mci &= ~bit; |
| if (level) { |
| s->sys_mci |= bit; |
| } |
| break; |
| } |
| case ARM_SYSCTL_GPIO_MMC_CARDIN: |
| s->sys_mci &= ~1; |
| if (level) { |
| s->sys_mci |= 1; |
| } |
| break; |
| } |
| } |
| |
| static int arm_sysctl_init1(SysBusDevice *dev) |
| { |
| arm_sysctl_state *s = FROM_SYSBUS(arm_sysctl_state, dev); |
| |
| memory_region_init_io(&s->iomem, &arm_sysctl_ops, s, "arm-sysctl", 0x1000); |
| sysbus_init_mmio_region(dev, &s->iomem); |
| qdev_init_gpio_in(&s->busdev.qdev, arm_sysctl_gpio_set, 2); |
| qdev_init_gpio_out(&s->busdev.qdev, &s->pl110_mux_ctrl, 1); |
| return 0; |
| } |
| |
| /* Legacy helper function. */ |
| void arm_sysctl_init(uint32_t base, uint32_t sys_id, uint32_t proc_id) |
| { |
| DeviceState *dev; |
| |
| dev = qdev_create(NULL, "realview_sysctl"); |
| qdev_prop_set_uint32(dev, "sys_id", sys_id); |
| qdev_init_nofail(dev); |
| qdev_prop_set_uint32(dev, "proc_id", proc_id); |
| sysbus_mmio_map(sysbus_from_qdev(dev), 0, base); |
| } |
| |
| static SysBusDeviceInfo arm_sysctl_info = { |
| .init = arm_sysctl_init1, |
| .qdev.name = "realview_sysctl", |
| .qdev.size = sizeof(arm_sysctl_state), |
| .qdev.vmsd = &vmstate_arm_sysctl, |
| .qdev.reset = arm_sysctl_reset, |
| .qdev.props = (Property[]) { |
| DEFINE_PROP_UINT32("sys_id", arm_sysctl_state, sys_id, 0), |
| DEFINE_PROP_UINT32("proc_id", arm_sysctl_state, proc_id, 0), |
| DEFINE_PROP_END_OF_LIST(), |
| } |
| }; |
| |
| static void arm_sysctl_register_devices(void) |
| { |
| sysbus_register_withprop(&arm_sysctl_info); |
| } |
| |
| device_init(arm_sysctl_register_devices) |
