/* * ASPEED System Control Unit * * Andrew Jeffery <andrew@aj.id.au> * * Copyright 2016 IBM Corp. * * This code is licensed under the GPL version 2 or later. See * the COPYING file in the top-level directory. */ #include "qemu/osdep.h" #include "hw/misc/aspeed_scu.h" #include "hw/qdev-properties.h" #include "migration/vmstate.h" #include "qapi/error.h" #include "qapi/visitor.h" #include "qemu/bitops.h" #include "qemu/log.h" #include "qemu/guest-random.h" #include "qemu/module.h" #include "trace.h" #define TO_REG(offset) ((offset) >> 2) #define PROT_KEY TO_REG(0x00) #define SYS_RST_CTRL TO_REG(0x04) #define CLK_SEL TO_REG(0x08) #define CLK_STOP_CTRL TO_REG(0x0C) #define FREQ_CNTR_CTRL TO_REG(0x10) #define FREQ_CNTR_EVAL TO_REG(0x14) #define IRQ_CTRL TO_REG(0x18) #define D2PLL_PARAM TO_REG(0x1C) #define MPLL_PARAM TO_REG(0x20) #define HPLL_PARAM TO_REG(0x24) #define FREQ_CNTR_RANGE TO_REG(0x28) #define MISC_CTRL1 TO_REG(0x2C) #define PCI_CTRL1 TO_REG(0x30) #define PCI_CTRL2 TO_REG(0x34) #define PCI_CTRL3 TO_REG(0x38) #define SYS_RST_STATUS TO_REG(0x3C) #define SOC_SCRATCH1 TO_REG(0x40) #define SOC_SCRATCH2 TO_REG(0x44) #define MAC_CLK_DELAY TO_REG(0x48) #define MISC_CTRL2 TO_REG(0x4C) #define VGA_SCRATCH1 TO_REG(0x50) #define VGA_SCRATCH2 TO_REG(0x54) #define VGA_SCRATCH3 TO_REG(0x58) #define VGA_SCRATCH4 TO_REG(0x5C) #define VGA_SCRATCH5 TO_REG(0x60) #define VGA_SCRATCH6 TO_REG(0x64) #define VGA_SCRATCH7 TO_REG(0x68) #define VGA_SCRATCH8 TO_REG(0x6C) #define HW_STRAP1 TO_REG(0x70) #define RNG_CTRL TO_REG(0x74) #define RNG_DATA TO_REG(0x78) #define SILICON_REV TO_REG(0x7C) #define PINMUX_CTRL1 TO_REG(0x80) #define PINMUX_CTRL2 TO_REG(0x84) #define PINMUX_CTRL3 TO_REG(0x88) #define PINMUX_CTRL4 TO_REG(0x8C) #define PINMUX_CTRL5 TO_REG(0x90) #define PINMUX_CTRL6 TO_REG(0x94) #define WDT_RST_CTRL TO_REG(0x9C) #define PINMUX_CTRL7 TO_REG(0xA0) #define PINMUX_CTRL8 TO_REG(0xA4) #define PINMUX_CTRL9 TO_REG(0xA8) #define WAKEUP_EN TO_REG(0xC0) #define WAKEUP_CTRL TO_REG(0xC4) #define HW_STRAP2 TO_REG(0xD0) #define FREE_CNTR4 TO_REG(0xE0) #define FREE_CNTR4_EXT TO_REG(0xE4) #define CPU2_CTRL TO_REG(0x100) #define CPU2_BASE_SEG1 TO_REG(0x104) #define CPU2_BASE_SEG2 TO_REG(0x108) #define CPU2_BASE_SEG3 TO_REG(0x10C) #define CPU2_BASE_SEG4 TO_REG(0x110) #define CPU2_BASE_SEG5 TO_REG(0x114) #define CPU2_CACHE_CTRL TO_REG(0x118) #define CHIP_ID0 TO_REG(0x150) #define CHIP_ID1 TO_REG(0x154) #define UART_HPLL_CLK TO_REG(0x160) #define PCIE_CTRL TO_REG(0x180) #define BMC_MMIO_CTRL TO_REG(0x184) #define RELOC_DECODE_BASE1 TO_REG(0x188) #define RELOC_DECODE_BASE2 TO_REG(0x18C) #define MAILBOX_DECODE_BASE TO_REG(0x190) #define SRAM_DECODE_BASE1 TO_REG(0x194) #define SRAM_DECODE_BASE2 TO_REG(0x198) #define BMC_REV TO_REG(0x19C) #define BMC_DEV_ID TO_REG(0x1A4) #define AST2600_PROT_KEY TO_REG(0x00) #define AST2600_SILICON_REV TO_REG(0x04) #define AST2600_SILICON_REV2 TO_REG(0x14) #define AST2600_SYS_RST_CTRL TO_REG(0x40) #define AST2600_SYS_RST_CTRL_CLR TO_REG(0x44) #define AST2600_SYS_RST_CTRL2 TO_REG(0x50) #define AST2600_SYS_RST_CTRL2_CLR TO_REG(0x54) #define AST2600_CLK_STOP_CTRL TO_REG(0x80) #define AST2600_CLK_STOP_CTRL_CLR TO_REG(0x84) #define AST2600_CLK_STOP_CTRL2 TO_REG(0x90) #define AST2600_CLK_STOP_CTRL2_CLR TO_REG(0x94) #define AST2600_DEBUG_CTRL TO_REG(0xC8) #define AST2600_DEBUG_CTRL2 TO_REG(0xD8) #define AST2600_SDRAM_HANDSHAKE TO_REG(0x100) #define AST2600_HPLL_PARAM TO_REG(0x200) #define AST2600_HPLL_EXT TO_REG(0x204) #define AST2600_APLL_PARAM TO_REG(0x210) #define AST2600_APLL_EXT TO_REG(0x214) #define AST2600_MPLL_PARAM TO_REG(0x220) #define AST2600_MPLL_EXT TO_REG(0x224) #define AST2600_EPLL_PARAM TO_REG(0x240) #define AST2600_EPLL_EXT TO_REG(0x244) #define AST2600_DPLL_PARAM TO_REG(0x260) #define AST2600_DPLL_EXT TO_REG(0x264) #define AST2600_CLK_SEL TO_REG(0x300) #define AST2600_CLK_SEL2 TO_REG(0x304) #define AST2600_CLK_SEL3 TO_REG(0x308) #define AST2600_CLK_SEL4 TO_REG(0x310) #define AST2600_CLK_SEL5 TO_REG(0x314) #define AST2600_UARTCLK TO_REG(0x338) #define AST2600_HUARTCLK TO_REG(0x33C) #define AST2600_HW_STRAP1 TO_REG(0x500) #define AST2600_HW_STRAP1_CLR TO_REG(0x504) #define AST2600_HW_STRAP1_PROT TO_REG(0x508) #define AST2600_HW_STRAP2 TO_REG(0x510) #define AST2600_HW_STRAP2_CLR TO_REG(0x514) #define AST2600_HW_STRAP2_PROT TO_REG(0x518) #define AST2600_RNG_CTRL TO_REG(0x524) #define AST2600_RNG_DATA TO_REG(0x540) #define AST2600_CHIP_ID0 TO_REG(0x5B0) #define AST2600_CHIP_ID1 TO_REG(0x5B4) #define AST2600_CLK TO_REG(0x40) #define SCU_IO_REGION_SIZE 0x1000 static const uint32_t ast2400_a0_resets[ASPEED_SCU_NR_REGS] = { [SYS_RST_CTRL] = 0xFFCFFEDCU, [CLK_SEL] = 0xF3F40000U, [CLK_STOP_CTRL] = 0x19FC3E8BU, [D2PLL_PARAM] = 0x00026108U, [MPLL_PARAM] = 0x00030291U, [HPLL_PARAM] = 0x00000291U, [MISC_CTRL1] = 0x00000010U, [PCI_CTRL1] = 0x20001A03U, [PCI_CTRL2] = 0x20001A03U, [PCI_CTRL3] = 0x04000030U, [SYS_RST_STATUS] = 0x00000001U, [SOC_SCRATCH1] = 0x000000C0U, /* SoC completed DRAM init */ [MISC_CTRL2] = 0x00000023U, [RNG_CTRL] = 0x0000000EU, [PINMUX_CTRL2] = 0x0000F000U, [PINMUX_CTRL3] = 0x01000000U, [PINMUX_CTRL4] = 0x000000FFU, [PINMUX_CTRL5] = 0x0000A000U, [WDT_RST_CTRL] = 0x003FFFF3U, [PINMUX_CTRL8] = 0xFFFF0000U, [PINMUX_CTRL9] = 0x000FFFFFU, [FREE_CNTR4] = 0x000000FFU, [FREE_CNTR4_EXT] = 0x000000FFU, [CPU2_BASE_SEG1] = 0x80000000U, [CPU2_BASE_SEG4] = 0x1E600000U, [CPU2_BASE_SEG5] = 0xC0000000U, [UART_HPLL_CLK] = 0x00001903U, [PCIE_CTRL] = 0x0000007BU, [BMC_DEV_ID] = 0x00002402U }; /* SCU70 bit 23: 0 24Mhz. bit 11:9: 0b001 AXI:ABH ratio 2:1 */ /* AST2500 revision A1 */ static const uint32_t ast2500_a1_resets[ASPEED_SCU_NR_REGS] = { [SYS_RST_CTRL] = 0xFFCFFEDCU, [CLK_SEL] = 0xF3F40000U, [CLK_STOP_CTRL] = 0x19FC3E8BU, [D2PLL_PARAM] = 0x00026108U, [MPLL_PARAM] = 0x00030291U, [HPLL_PARAM] = 0x93000400U, [MISC_CTRL1] = 0x00000010U, [PCI_CTRL1] = 0x20001A03U, [PCI_CTRL2] = 0x20001A03U, [PCI_CTRL3] = 0x04000030U, [SYS_RST_STATUS] = 0x00000001U, [SOC_SCRATCH1] = 0x000000C0U, /* SoC completed DRAM init */ [MISC_CTRL2] = 0x00000023U, [RNG_CTRL] = 0x0000000EU, [PINMUX_CTRL2] = 0x0000F000U, [PINMUX_CTRL3] = 0x03000000U, [PINMUX_CTRL4] = 0x00000000U, [PINMUX_CTRL5] = 0x0000A000U, [WDT_RST_CTRL] = 0x023FFFF3U, [PINMUX_CTRL8] = 0xFFFF0000U, [PINMUX_CTRL9] = 0x000FFFFFU, [FREE_CNTR4] = 0x000000FFU, [FREE_CNTR4_EXT] = 0x000000FFU, [CPU2_BASE_SEG1] = 0x80000000U, [CPU2_BASE_SEG4] = 0x1E600000U, [CPU2_BASE_SEG5] = 0xC0000000U, [CHIP_ID0] = 0x1234ABCDU, [CHIP_ID1] = 0x88884444U, [UART_HPLL_CLK] = 0x00001903U, [PCIE_CTRL] = 0x0000007BU, [BMC_DEV_ID] = 0x00002402U }; static uint32_t aspeed_scu_get_random(void) { uint32_t num; qemu_guest_getrandom_nofail(&num, sizeof(num)); return num; } uint32_t aspeed_scu_get_apb_freq(AspeedSCUState *s) { return ASPEED_SCU_GET_CLASS(s)->get_apb(s); } static uint32_t aspeed_2400_scu_get_apb_freq(AspeedSCUState *s) { AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(s); uint32_t hpll = asc->calc_hpll(s, s->regs[HPLL_PARAM]); return hpll / (SCU_CLK_GET_PCLK_DIV(s->regs[CLK_SEL]) + 1) / asc->apb_divider; } static uint32_t aspeed_2600_scu_get_apb_freq(AspeedSCUState *s) { AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(s); uint32_t hpll = asc->calc_hpll(s, s->regs[AST2600_HPLL_PARAM]); return hpll / (SCU_CLK_GET_PCLK_DIV(s->regs[AST2600_CLK_SEL]) + 1) / asc->apb_divider; } static uint32_t aspeed_1030_scu_get_apb_freq(AspeedSCUState *s) { AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(s); uint32_t hpll = asc->calc_hpll(s, s->regs[AST2600_HPLL_PARAM]); return hpll / (SCU_AST1030_CLK_GET_PCLK_DIV(s->regs[AST2600_CLK_SEL4]) + 1) / asc->apb_divider; } static uint64_t aspeed_scu_read(void *opaque, hwaddr offset, unsigned size) { AspeedSCUState *s = ASPEED_SCU(opaque); int reg = TO_REG(offset); if (reg >= ASPEED_SCU_NR_REGS) { qemu_log_mask(LOG_GUEST_ERROR, "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n", __func__, offset); return 0; } switch (reg) { case RNG_DATA: /* On hardware, RNG_DATA works regardless of * the state of the enable bit in RNG_CTRL */ s->regs[RNG_DATA] = aspeed_scu_get_random(); break; case WAKEUP_EN: qemu_log_mask(LOG_GUEST_ERROR, "%s: Read of write-only offset 0x%" HWADDR_PRIx "\n", __func__, offset); break; } trace_aspeed_scu_read(offset, size, s->regs[reg]); return s->regs[reg]; } static void aspeed_ast2400_scu_write(void *opaque, hwaddr offset, uint64_t data, unsigned size) { AspeedSCUState *s = ASPEED_SCU(opaque); int reg = TO_REG(offset); if (reg >= ASPEED_SCU_NR_REGS) { qemu_log_mask(LOG_GUEST_ERROR, "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n", __func__, offset); return; } if (reg > PROT_KEY && reg < CPU2_BASE_SEG1 && !s->regs[PROT_KEY]) { qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__); } trace_aspeed_scu_write(offset, size, data); switch (reg) { case PROT_KEY: s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0; return; case SILICON_REV: case FREQ_CNTR_EVAL: case VGA_SCRATCH1 ... VGA_SCRATCH8: case RNG_DATA: case FREE_CNTR4: case FREE_CNTR4_EXT: qemu_log_mask(LOG_GUEST_ERROR, "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n", __func__, offset); return; } s->regs[reg] = data; } static void aspeed_ast2500_scu_write(void *opaque, hwaddr offset, uint64_t data, unsigned size) { AspeedSCUState *s = ASPEED_SCU(opaque); int reg = TO_REG(offset); if (reg >= ASPEED_SCU_NR_REGS) { qemu_log_mask(LOG_GUEST_ERROR, "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n", __func__, offset); return; } if (reg > PROT_KEY && reg < CPU2_BASE_SEG1 && !s->regs[PROT_KEY]) { qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__); return; } trace_aspeed_scu_write(offset, size, data); switch (reg) { case PROT_KEY: s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0; return; case HW_STRAP1: s->regs[HW_STRAP1] |= data; return; case SILICON_REV: s->regs[HW_STRAP1] &= ~data; return; case FREQ_CNTR_EVAL: case VGA_SCRATCH1 ... VGA_SCRATCH8: case RNG_DATA: case FREE_CNTR4: case FREE_CNTR4_EXT: case CHIP_ID0: case CHIP_ID1: qemu_log_mask(LOG_GUEST_ERROR, "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n", __func__, offset); return; } s->regs[reg] = data; } static const MemoryRegionOps aspeed_ast2400_scu_ops = { .read = aspeed_scu_read, .write = aspeed_ast2400_scu_write, .endianness = DEVICE_LITTLE_ENDIAN, .valid = { .min_access_size = 1, .max_access_size = 4, }, }; static const MemoryRegionOps aspeed_ast2500_scu_ops = { .read = aspeed_scu_read, .write = aspeed_ast2500_scu_write, .endianness = DEVICE_LITTLE_ENDIAN, .valid.min_access_size = 4, .valid.max_access_size = 4, .valid.unaligned = false, }; static uint32_t aspeed_scu_get_clkin(AspeedSCUState *s) { if (s->hw_strap1 & SCU_HW_STRAP_CLK_25M_IN || ASPEED_SCU_GET_CLASS(s)->clkin_25Mhz) { return 25000000; } else if (s->hw_strap1 & SCU_HW_STRAP_CLK_48M_IN) { return 48000000; } else { return 24000000; } } /* * Strapped frequencies for the AST2400 in MHz. They depend on the * clkin frequency. */ static const uint32_t hpll_ast2400_freqs[][4] = { { 384, 360, 336, 408 }, /* 24MHz or 48MHz */ { 400, 375, 350, 425 }, /* 25MHz */ }; static uint32_t aspeed_2400_scu_calc_hpll(AspeedSCUState *s, uint32_t hpll_reg) { uint8_t freq_select; bool clk_25m_in; uint32_t clkin = aspeed_scu_get_clkin(s); if (hpll_reg & SCU_AST2400_H_PLL_OFF) { return 0; } if (hpll_reg & SCU_AST2400_H_PLL_PROGRAMMED) { uint32_t multiplier = 1; if (!(hpll_reg & SCU_AST2400_H_PLL_BYPASS_EN)) { uint32_t n = (hpll_reg >> 5) & 0x3f; uint32_t od = (hpll_reg >> 4) & 0x1; uint32_t d = hpll_reg & 0xf; multiplier = (2 - od) * ((n + 2) / (d + 1)); } return clkin * multiplier; } /* HW strapping */ clk_25m_in = !!(s->hw_strap1 & SCU_HW_STRAP_CLK_25M_IN); freq_select = SCU_AST2400_HW_STRAP_GET_H_PLL_CLK(s->hw_strap1); return hpll_ast2400_freqs[clk_25m_in][freq_select] * 1000000; } static uint32_t aspeed_2500_scu_calc_hpll(AspeedSCUState *s, uint32_t hpll_reg) { uint32_t multiplier = 1; uint32_t clkin = aspeed_scu_get_clkin(s); if (hpll_reg & SCU_H_PLL_OFF) { return 0; } if (!(hpll_reg & SCU_H_PLL_BYPASS_EN)) { uint32_t p = (hpll_reg >> 13) & 0x3f; uint32_t m = (hpll_reg >> 5) & 0xff; uint32_t n = hpll_reg & 0x1f; multiplier = ((m + 1) / (n + 1)) / (p + 1); } return clkin * multiplier; } static uint32_t aspeed_2600_scu_calc_hpll(AspeedSCUState *s, uint32_t hpll_reg) { uint32_t multiplier = 1; uint32_t clkin = aspeed_scu_get_clkin(s); if (hpll_reg & SCU_AST2600_H_PLL_OFF) { return 0; } if (!(hpll_reg & SCU_AST2600_H_PLL_BYPASS_EN)) { uint32_t p = (hpll_reg >> 19) & 0xf; uint32_t n = (hpll_reg >> 13) & 0x3f; uint32_t m = hpll_reg & 0x1fff; multiplier = ((m + 1) / (n + 1)) / (p + 1); } return clkin * multiplier; } static void aspeed_scu_reset(DeviceState *dev) { AspeedSCUState *s = ASPEED_SCU(dev); AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev); memcpy(s->regs, asc->resets, asc->nr_regs * 4); s->regs[SILICON_REV] = s->silicon_rev; s->regs[HW_STRAP1] = s->hw_strap1; s->regs[HW_STRAP2] = s->hw_strap2; s->regs[PROT_KEY] = s->hw_prot_key; } static uint32_t aspeed_silicon_revs[] = { AST2400_A0_SILICON_REV, AST2400_A1_SILICON_REV, AST2500_A0_SILICON_REV, AST2500_A1_SILICON_REV, AST2600_A0_SILICON_REV, AST2600_A1_SILICON_REV, AST2600_A2_SILICON_REV, AST2600_A3_SILICON_REV, AST1030_A0_SILICON_REV, AST1030_A1_SILICON_REV, }; bool is_supported_silicon_rev(uint32_t silicon_rev) { int i; for (i = 0; i < ARRAY_SIZE(aspeed_silicon_revs); i++) { if (silicon_rev == aspeed_silicon_revs[i]) { return true; } } return false; } static void aspeed_scu_realize(DeviceState *dev, Error **errp) { SysBusDevice *sbd = SYS_BUS_DEVICE(dev); AspeedSCUState *s = ASPEED_SCU(dev); AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev); if (!is_supported_silicon_rev(s->silicon_rev)) { error_setg(errp, "Unknown silicon revision: 0x%" PRIx32, s->silicon_rev); return; } memory_region_init_io(&s->iomem, OBJECT(s), asc->ops, s, TYPE_ASPEED_SCU, SCU_IO_REGION_SIZE); sysbus_init_mmio(sbd, &s->iomem); } static const VMStateDescription vmstate_aspeed_scu = { .name = "aspeed.scu", .version_id = 2, .minimum_version_id = 2, .fields = (VMStateField[]) { VMSTATE_UINT32_ARRAY(regs, AspeedSCUState, ASPEED_AST2600_SCU_NR_REGS), VMSTATE_END_OF_LIST() } }; static Property aspeed_scu_properties[] = { DEFINE_PROP_UINT32("silicon-rev", AspeedSCUState, silicon_rev, 0), DEFINE_PROP_UINT32("hw-strap1", AspeedSCUState, hw_strap1, 0), DEFINE_PROP_UINT32("hw-strap2", AspeedSCUState, hw_strap2, 0), DEFINE_PROP_UINT32("hw-prot-key", AspeedSCUState, hw_prot_key, 0), DEFINE_PROP_END_OF_LIST(), }; static void aspeed_scu_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); dc->realize = aspeed_scu_realize; dc->reset = aspeed_scu_reset; dc->desc = "ASPEED System Control Unit"; dc->vmsd = &vmstate_aspeed_scu; device_class_set_props(dc, aspeed_scu_properties); } static const TypeInfo aspeed_scu_info = { .name = TYPE_ASPEED_SCU, .parent = TYPE_SYS_BUS_DEVICE, .instance_size = sizeof(AspeedSCUState), .class_init = aspeed_scu_class_init, .class_size = sizeof(AspeedSCUClass), .abstract = true, }; static void aspeed_2400_scu_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass); dc->desc = "ASPEED 2400 System Control Unit"; asc->resets = ast2400_a0_resets; asc->calc_hpll = aspeed_2400_scu_calc_hpll; asc->get_apb = aspeed_2400_scu_get_apb_freq; asc->apb_divider = 2; asc->nr_regs = ASPEED_SCU_NR_REGS; asc->clkin_25Mhz = false; asc->ops = &aspeed_ast2400_scu_ops; } static const TypeInfo aspeed_2400_scu_info = { .name = TYPE_ASPEED_2400_SCU, .parent = TYPE_ASPEED_SCU, .instance_size = sizeof(AspeedSCUState), .class_init = aspeed_2400_scu_class_init, }; static void aspeed_2500_scu_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass); dc->desc = "ASPEED 2500 System Control Unit"; asc->resets = ast2500_a1_resets; asc->calc_hpll = aspeed_2500_scu_calc_hpll; asc->get_apb = aspeed_2400_scu_get_apb_freq; asc->apb_divider = 4; asc->nr_regs = ASPEED_SCU_NR_REGS; asc->clkin_25Mhz = false; asc->ops = &aspeed_ast2500_scu_ops; } static const TypeInfo aspeed_2500_scu_info = { .name = TYPE_ASPEED_2500_SCU, .parent = TYPE_ASPEED_SCU, .instance_size = sizeof(AspeedSCUState), .class_init = aspeed_2500_scu_class_init, }; static uint64_t aspeed_ast2600_scu_read(void *opaque, hwaddr offset, unsigned size) { AspeedSCUState *s = ASPEED_SCU(opaque); int reg = TO_REG(offset); if (reg >= ASPEED_AST2600_SCU_NR_REGS) { qemu_log_mask(LOG_GUEST_ERROR, "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n", __func__, offset); return 0; } switch (reg) { case AST2600_HPLL_EXT: case AST2600_EPLL_EXT: case AST2600_MPLL_EXT: /* PLLs are always "locked" */ return s->regs[reg] | BIT(31); case AST2600_RNG_DATA: /* * On hardware, RNG_DATA works regardless of the state of the * enable bit in RNG_CTRL * * TODO: Check this is true for ast2600 */ s->regs[AST2600_RNG_DATA] = aspeed_scu_get_random(); break; } trace_aspeed_scu_read(offset, size, s->regs[reg]); return s->regs[reg]; } static void aspeed_ast2600_scu_write(void *opaque, hwaddr offset, uint64_t data64, unsigned size) { AspeedSCUState *s = ASPEED_SCU(opaque); int reg = TO_REG(offset); /* Truncate here so bitwise operations below behave as expected */ uint32_t data = data64; if (reg >= ASPEED_AST2600_SCU_NR_REGS) { qemu_log_mask(LOG_GUEST_ERROR, "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n", __func__, offset); return; } if (reg > PROT_KEY && !s->regs[PROT_KEY]) { qemu_log_mask(LOG_GUEST_ERROR, "%s: SCU is locked!\n", __func__); } trace_aspeed_scu_write(offset, size, data); switch (reg) { case AST2600_PROT_KEY: s->regs[reg] = (data == ASPEED_SCU_PROT_KEY) ? 1 : 0; return; case AST2600_HW_STRAP1: case AST2600_HW_STRAP2: if (s->regs[reg + 2]) { return; } /* fall through */ case AST2600_SYS_RST_CTRL: case AST2600_SYS_RST_CTRL2: case AST2600_CLK_STOP_CTRL: case AST2600_CLK_STOP_CTRL2: /* W1S (Write 1 to set) registers */ s->regs[reg] |= data; return; case AST2600_SYS_RST_CTRL_CLR: case AST2600_SYS_RST_CTRL2_CLR: case AST2600_CLK_STOP_CTRL_CLR: case AST2600_CLK_STOP_CTRL2_CLR: case AST2600_HW_STRAP1_CLR: case AST2600_HW_STRAP2_CLR: /* * W1C (Write 1 to clear) registers are offset by one address from * the data register */ s->regs[reg - 1] &= ~data; return; case AST2600_RNG_DATA: case AST2600_SILICON_REV: case AST2600_SILICON_REV2: case AST2600_CHIP_ID0: case AST2600_CHIP_ID1: /* Add read only registers here */ qemu_log_mask(LOG_GUEST_ERROR, "%s: Write to read-only offset 0x%" HWADDR_PRIx "\n", __func__, offset); return; } s->regs[reg] = data; } static const MemoryRegionOps aspeed_ast2600_scu_ops = { .read = aspeed_ast2600_scu_read, .write = aspeed_ast2600_scu_write, .endianness = DEVICE_LITTLE_ENDIAN, .valid.min_access_size = 4, .valid.max_access_size = 4, .valid.unaligned = false, }; static const uint32_t ast2600_a3_resets[ASPEED_AST2600_SCU_NR_REGS] = { [AST2600_SYS_RST_CTRL] = 0xF7C3FED8, [AST2600_SYS_RST_CTRL2] = 0x0DFFFFFC, [AST2600_CLK_STOP_CTRL] = 0xFFFF7F8A, [AST2600_CLK_STOP_CTRL2] = 0xFFF0FFF0, [AST2600_DEBUG_CTRL] = 0x00000FFF, [AST2600_DEBUG_CTRL2] = 0x000000FF, [AST2600_SDRAM_HANDSHAKE] = 0x00000000, [AST2600_HPLL_PARAM] = 0x1000408F, [AST2600_APLL_PARAM] = 0x1000405F, [AST2600_MPLL_PARAM] = 0x1008405F, [AST2600_EPLL_PARAM] = 0x1004077F, [AST2600_DPLL_PARAM] = 0x1078405F, [AST2600_CLK_SEL] = 0xF3940000, [AST2600_CLK_SEL2] = 0x00700000, [AST2600_CLK_SEL3] = 0x00000000, [AST2600_CLK_SEL4] = 0xF3F40000, [AST2600_CLK_SEL5] = 0x30000000, [AST2600_UARTCLK] = 0x00014506, [AST2600_HUARTCLK] = 0x000145C0, [AST2600_CHIP_ID0] = 0x1234ABCD, [AST2600_CHIP_ID1] = 0x88884444, }; static void aspeed_ast2600_scu_reset(DeviceState *dev) { AspeedSCUState *s = ASPEED_SCU(dev); AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev); memcpy(s->regs, asc->resets, asc->nr_regs * 4); /* * A0 reports A0 in _REV, but subsequent revisions report A1 regardless * of actual revision. QEMU and Linux only support A1 onwards so this is * sufficient. */ s->regs[AST2600_SILICON_REV] = AST2600_A3_SILICON_REV; s->regs[AST2600_SILICON_REV2] = s->silicon_rev; s->regs[AST2600_HW_STRAP1] = s->hw_strap1; s->regs[AST2600_HW_STRAP2] = s->hw_strap2; s->regs[PROT_KEY] = s->hw_prot_key; } static void aspeed_2600_scu_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass); dc->desc = "ASPEED 2600 System Control Unit"; dc->reset = aspeed_ast2600_scu_reset; asc->resets = ast2600_a3_resets; asc->calc_hpll = aspeed_2600_scu_calc_hpll; asc->get_apb = aspeed_2600_scu_get_apb_freq; asc->apb_divider = 4; asc->nr_regs = ASPEED_AST2600_SCU_NR_REGS; asc->clkin_25Mhz = true; asc->ops = &aspeed_ast2600_scu_ops; } static const TypeInfo aspeed_2600_scu_info = { .name = TYPE_ASPEED_2600_SCU, .parent = TYPE_ASPEED_SCU, .instance_size = sizeof(AspeedSCUState), .class_init = aspeed_2600_scu_class_init, }; static const uint32_t ast1030_a1_resets[ASPEED_AST2600_SCU_NR_REGS] = { [AST2600_SYS_RST_CTRL] = 0xFFC3FED8, [AST2600_SYS_RST_CTRL2] = 0x09FFFFFC, [AST2600_CLK_STOP_CTRL] = 0xFFFF7F8A, [AST2600_CLK_STOP_CTRL2] = 0xFFF0FFF0, [AST2600_DEBUG_CTRL2] = 0x00000000, [AST2600_HPLL_PARAM] = 0x10004077, [AST2600_HPLL_EXT] = 0x00000031, [AST2600_CLK_SEL4] = 0x43F90900, [AST2600_CLK_SEL5] = 0x40000000, [AST2600_CHIP_ID0] = 0xDEADBEEF, [AST2600_CHIP_ID1] = 0x0BADCAFE, }; static void aspeed_ast1030_scu_reset(DeviceState *dev) { AspeedSCUState *s = ASPEED_SCU(dev); AspeedSCUClass *asc = ASPEED_SCU_GET_CLASS(dev); memcpy(s->regs, asc->resets, asc->nr_regs * 4); s->regs[AST2600_SILICON_REV] = AST1030_A1_SILICON_REV; s->regs[AST2600_SILICON_REV2] = s->silicon_rev; s->regs[AST2600_HW_STRAP1] = s->hw_strap1; s->regs[AST2600_HW_STRAP2] = s->hw_strap2; s->regs[PROT_KEY] = s->hw_prot_key; } static void aspeed_1030_scu_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); AspeedSCUClass *asc = ASPEED_SCU_CLASS(klass); dc->desc = "ASPEED 1030 System Control Unit"; dc->reset = aspeed_ast1030_scu_reset; asc->resets = ast1030_a1_resets; asc->calc_hpll = aspeed_2600_scu_calc_hpll; asc->get_apb = aspeed_1030_scu_get_apb_freq; asc->apb_divider = 2; asc->nr_regs = ASPEED_AST2600_SCU_NR_REGS; asc->clkin_25Mhz = true; asc->ops = &aspeed_ast2600_scu_ops; } static const TypeInfo aspeed_1030_scu_info = { .name = TYPE_ASPEED_1030_SCU, .parent = TYPE_ASPEED_SCU, .instance_size = sizeof(AspeedSCUState), .class_init = aspeed_1030_scu_class_init, }; static void aspeed_scu_register_types(void) { type_register_static(&aspeed_scu_info); type_register_static(&aspeed_2400_scu_info); type_register_static(&aspeed_2500_scu_info); type_register_static(&aspeed_2600_scu_info); type_register_static(&aspeed_1030_scu_info); } type_init(aspeed_scu_register_types);