// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) ASPEED Technology Inc. * Chia-Wei Wang */ #include #include #include #include #include /* * SMP mailbox * +----------------------+ * | | * | mailbox insn. for | * | cpuN polling SMP go | * | | * +----------------------+ 0xC * | mailbox ready signal | * +----------------------+ 0x8 * | cpuN GO signal | * +----------------------+ 0x4 * | cpuN entrypoint | * +----------------------+ AST_SMP_MAILBOX_BASE */ #define AST_SMP_MAILBOX_BASE (0x1E6E2180) #define AST_SMP_MBOX_FIELD_ENTRY (AST_SMP_MAILBOX_BASE + 0x0) #define AST_SMP_MBOX_FIELD_GOSIGN (AST_SMP_MAILBOX_BASE + 0x4) #define AST_SMP_MBOX_FIELD_READY (AST_SMP_MAILBOX_BASE + 0x8) #define AST_SMP_MBOX_FIELD_POLLINSN (AST_SMP_MAILBOX_BASE + 0xc) /* AST2600 HW registers */ #define AST_SCU_BASE (0x1E6E2000) #define AST_SCU_PROT_KEY1 (AST_SCU_BASE) #define AST_SCU_PROT_KEY2 (AST_SCU_BASE + 0x010) #define AST_SCU_REV_ID (AST_SCU_BASE + 0x014) #define AST_SCU_SYSRST_CTRL (AST_SCU_BASE + 0x040) #define AST_SCU_SYSRST_CTRL_CLR (AST_SCU_BASE + 0x044) #define AST_SCU_HPLL_PARAM (AST_SCU_BASE + 0x200) #define AST_SCU_HPLL_PARAM_EXT (AST_SCU_BASE + 0x204) #define AST_SCU_HW_STRAP1 (AST_SCU_BASE + 0x500) #define AST_SCU_HW_STRAP2 (AST_SCU_BASE + 0x510) #define AST_SCU_CA7_CTRL (AST_SCU_BASE + 0x800) #define AST_SCU_CA7_AXI_PREFETCH_START (AST_SCU_BASE + 0x808) #define AST_SCU_CA7_AXI_PREFETCH_END (AST_SCU_BASE + 0x80C) #define AST_SCU_CA7_PARITY_CHK (AST_SCU_BASE + 0x820) #define AST_SCU_CA7_PARITY_CLR (AST_SCU_BASE + 0x824) #define AST_SCU_MMIO_DEC_SET (AST_SCU_BASE + 0xC24) #define AST_FMC_BASE (0x1E620000) #define AST_FMC_CE0_CTRL (AST_FMC_BASE + 0x010) #define AST_FMC_WDT1_CTRL_MODE (AST_FMC_BASE + 0x060) #define AST_FMC_WDT2_CTRL_MODE (AST_FMC_BASE + 0x064) #define AST_GPIO_BASE (0x1E780000) #define AST_GPIOYZ_DATA_VALUE (AST_GPIO_BASE + 0x1E0) /* Revision ID */ #define REV_ID_AST2600A0 0x05000303 .macro scu_unlock movw r0, #0xA8A8 movt r0, #0x1688 @; magic key to unlock SCU ldr r1, =AST_SCU_PROT_KEY1 str r0, [r1] ldr r1, =AST_SCU_PROT_KEY2 str r0, [r1] .endm .macro timer_init #ifdef CONFIG_FPGA_ASPEED movw r0, #0xF080 movt r0, #0x2FA #else ldr r0, =AST_SCU_REV_ID ldr r0, [r0] ldr r1, =REV_ID_AST2600A0 cmp r0, r1 movweq r0, #0x32C0 movteq r0, #0x4013 movwne r0, #0x8C00 movtne r0, #0x4786 #endif mcr p15, 0, r0, c14, c0, 0 @; update CNTFRQ .endm .globl lowlevel_init lowlevel_init: #if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD) mov pc, lr #else /* setup ARM arch timer frequency */ timer_init /* reset SMP mailbox as early as possible */ mov r0, #0x0 ldr r1, =AST_SMP_MBOX_FIELD_READY str r0, [r1] /* set ACTLR.SMP to enable cache use */ mrc p15, 0, r0, c1, c0, 1 orr r0, #0x40 mcr p15, 0, r0, c1, c0, 1 /* * we treat cpu0 as the primary core and * put secondary core (cpuN) to sleep */ mrc p15, 0, r0, c0, c0, 5 @; Read CPU ID register ands r0, #0xFF @; Mask off, leaving the CPU ID field movw r2, #0xAB00 movt r2, #0xABBA orr r2, r0 beq do_primary_core_setup /* hold cpuN until mailbox is ready */ poll_mailbox_ready: wfe ldr r0, =AST_SMP_MBOX_FIELD_READY ldr r0, [r0] movw r1, #0xCAFE movt r1, #0xBABE cmp r1, r0 bne poll_mailbox_ready /* parameters for relocated SMP go polling insn. */ ldr r0, =AST_SMP_MBOX_FIELD_GOSIGN ldr r1, =AST_SMP_MBOX_FIELD_ENTRY /* no return */ ldr pc, =AST_SMP_MBOX_FIELD_POLLINSN do_primary_core_setup: /* unlock system control unit */ scu_unlock /* identify AST2600 A0/A1 */ ldr r0, =AST_SCU_REV_ID ldr r0, [r0] ldr r1, =REV_ID_AST2600A0 cmp r0, r1 bne 0f /* tune up CPU clocks (A0 only) */ ldr r0, =AST_SCU_HW_STRAP1 ldr r1, [r0] bic r1, #0x1800 orr r1, #0x1000 str r1, [r0] ldr r0, =AST_SCU_HPLL_PARAM movw r1, #0x4080 movt r1, #0x1000 str r1, [r0] ldr r0, =AST_SCU_HPLL_PARAM_EXT mov r1, #0x47 str r1, [r0] wait_lock: ldr r1, [r0] tst r1, #0x80000000 beq wait_lock /* skip A1 only area */ b 1f 0: /* enable AXI prefetch (A1 only) */ ldr r0, =AST_SCU_CA7_AXI_PREFETCH_START ldr r1, =ASPEED_DRAM_BASE str r1, [r0] ldr r0, =AST_SCU_CA7_AXI_PREFETCH_END ldr r1, =0xFFFFFFFF str r1, [r0] ldr r0, =AST_SCU_CA7_CTRL ldr r1, [r0] orr r1, #0x8000 str r1, [r0] /* LPC/eSPI mode selection (A1 only) */ ldr r0, =AST_GPIOYZ_DATA_VALUE ldr r0, [r0] tst r0, #0x1000 beq 1f /* switch to LPC mode if GPIOZ[4]=1 */ ldr r0, =AST_SCU_HW_STRAP2 ldr r1, [r0] orr r1, #0x40 str r1, [r0] 1: /* release display port reset */ ldr r0, =AST_SCU_SYSRST_CTRL_CLR movw r1, #0x0000 movt r1, #0x3000 str r1, [r0] /* MMIO decode setting */ ldr r0, =AST_SCU_MMIO_DEC_SET mov r1, #0x2000 str r1, [r0] /* enable cache & SRAM parity check */ mov r0, #0 ldr r1, =AST_SCU_CA7_PARITY_CLR str r0, [r1] mov r0, #0x1 ldr r1, =AST_SCU_CA7_PARITY_CHK str r0, [r1] /* disable FMC WDT for SPI address mode detection */ mov r0, #0 ldr r1, =AST_FMC_WDT1_CTRL_MODE str r0, [r1] #if 0 ldr r1, =AST_FMC_WDT2_CTRL_MODE str r0, [r1] #endif /* tune up SPI clock */ movw r0, #0x0641 movt r0, #0x203B ldr r1, =AST_FMC_CE0_CTRL str r0, [r1] /* relocate mailbox insn. for cpuN polling SMP go signal */ adrl r0, mailbox_insn adrl r1, mailbox_insn_end ldr r2, =#AST_SMP_MBOX_FIELD_POLLINSN relocate_mailbox_insn: ldr r3, [r0], #0x4 str r3, [r2], #0x4 cmp r0, r1 bne relocate_mailbox_insn /* reset SMP go sign */ mov r0, #0 ldr r1, =AST_SMP_MBOX_FIELD_GOSIGN str r0, [r1] /* notify cpuN mailbox is ready */ movw r0, #0xCAFE movt r0, #0xBABE ldr r1, =AST_SMP_MBOX_FIELD_READY str r0, [r1] sev /* back to arch calling code */ mov pc, lr /* * insn. inside mailbox to poll SMP go signal. * * Note that as this code will be relocated, any * pc-relative assembly should NOT be used. */ mailbox_insn: /* * r0 ~ r3 are parameters: * r0 = AST_SMP_MBOX_FIELD_GOSIGN * r1 = AST_SMP_MBOX_FIELD_ENTRY * r2 = per-cpu go sign value * r3 = no used now */ poll_mailbox_smp_go: wfe ldr r4, [r0] cmp r2, r4 bne poll_mailbox_smp_go /* SMP GO signal confirmed, release cpuN */ ldr pc, [r1] mailbox_insn_end: /* should never reach */ b . #endif