| /* |
| * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * Redistributions of source code must retain the above copyright notice, this |
| * list of conditions and the following disclaimer. |
| * |
| * Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * Neither the name of ARM nor the names of its contributors may be used |
| * to endorse or promote products derived from this software without specific |
| * prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| #include <arch.h> |
| #include <asm_macros.S> |
| #include <assert_macros.S> |
| #include <cpu_macros.S> |
| #include <cortex_a57.h> |
| #include <cortex_a53.h> |
| #include <tegra_def.h> |
| |
| /* Global functions */ |
| .globl platform_is_primary_cpu |
| .globl platform_get_core_pos |
| .globl platform_get_entrypoint |
| .globl plat_secondary_cold_boot_setup |
| .globl platform_mem_init |
| .globl plat_crash_console_init |
| .globl plat_crash_console_putc |
| .globl tegra_secure_entrypoint |
| .globl plat_reset_handler |
| |
| /* Global variables */ |
| .globl sec_entry_point |
| .globl ns_image_entrypoint |
| .globl tegra_bl31_phys_base |
| |
| /* --------------------- |
| * Common CPU init code |
| * --------------------- |
| */ |
| .macro cpu_init_common |
| |
| #if ENABLE_NS_L2_CPUECTRL_RW_ACCESS |
| /* ------------------------------------------------------- |
| * Enable L2 and CPU ECTLR RW access from non-secure world |
| * ------------------------------------------------------- |
| */ |
| mov x0, #ACTLR_EL3_ENABLE_ALL_ACCESS |
| msr actlr_el3, x0 |
| msr actlr_el2, x0 |
| isb |
| #endif |
| |
| /* -------------------------------- |
| * Enable the cycle count register |
| * -------------------------------- |
| */ |
| mrs x0, pmcr_el0 |
| ubfx x0, x0, #11, #5 // read PMCR.N field |
| mov x1, #1 |
| lsl x0, x1, x0 |
| sub x0, x0, #1 // mask of event counters |
| orr x0, x0, #0x80000000 // disable overflow intrs |
| msr pmintenclr_el1, x0 |
| msr pmuserenr_el0, x1 // enable user mode access |
| |
| /* ---------------------------------------------------------------- |
| * Allow non-privileged access to CNTVCT: Set CNTKCTL (Kernel Count |
| * register), bit 1 (EL0VCTEN) to enable access to CNTVCT/CNTFRQ |
| * registers from EL0. |
| * ---------------------------------------------------------------- |
| */ |
| mrs x0, cntkctl_el1 |
| orr x0, x0, #EL0VCTEN_BIT |
| msr cntkctl_el1, x0 |
| .endm |
| |
| /* ----------------------------------------------------- |
| * int platform_is_primary_cpu(int mpidr); |
| * |
| * This function checks if this is the Primary CPU |
| * ----------------------------------------------------- |
| */ |
| func platform_is_primary_cpu |
| and x0, x0, #(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK) |
| cmp x0, #TEGRA_PRIMARY_CPU |
| cset x0, eq |
| ret |
| endfunc platform_is_primary_cpu |
| |
| /* ----------------------------------------------------- |
| * int platform_get_core_pos(int mpidr); |
| * |
| * With this function: CorePos = CoreId |
| * ----------------------------------------------------- |
| */ |
| func platform_get_core_pos |
| and x0, x0, #MPIDR_CPU_MASK |
| ret |
| endfunc platform_get_core_pos |
| |
| /* ----------------------------------------------------- |
| * void plat_secondary_cold_boot_setup (void); |
| * |
| * This function performs any platform specific actions |
| * needed for a secondary cpu after a cold reset. Right |
| * now this is a stub function. |
| * ----------------------------------------------------- |
| */ |
| func plat_secondary_cold_boot_setup |
| mov x0, #0 |
| ret |
| endfunc plat_secondary_cold_boot_setup |
| |
| /* ----------------------------------------------------- |
| * void platform_get_entrypoint (unsigned int mpidr); |
| * |
| * Main job of this routine is to distinguish between |
| * a cold and warm boot. If the sec_entry_point for |
| * this CPU is present, then it's a warm boot. |
| * |
| * ----------------------------------------------------- |
| */ |
| func platform_get_entrypoint |
| and x0, x0, #MPIDR_CPU_MASK |
| adr x1, sec_entry_point |
| ldr x0, [x1, x0, lsl #3] |
| ret |
| endfunc platform_get_entrypoint |
| |
| /* -------------------------------------------------------- |
| * void platform_mem_init (void); |
| * |
| * Any memory init, relocation to be done before the |
| * platform boots. Called very early in the boot process. |
| * -------------------------------------------------------- |
| */ |
| func platform_mem_init |
| mov x0, #0 |
| ret |
| endfunc platform_mem_init |
| |
| /* --------------------------------------------- |
| * int plat_crash_console_init(void) |
| * Function to initialize the crash console |
| * without a C Runtime to print crash report. |
| * Clobber list : x0, x1, x2 |
| * --------------------------------------------- |
| */ |
| func plat_crash_console_init |
| mov_imm x0, TEGRA_BOOT_UART_BASE |
| mov_imm x1, TEGRA_BOOT_UART_CLK_IN_HZ |
| mov_imm x2, TEGRA_CONSOLE_BAUDRATE |
| b console_core_init |
| endfunc plat_crash_console_init |
| |
| /* --------------------------------------------- |
| * int plat_crash_console_putc(void) |
| * Function to print a character on the crash |
| * console without a C Runtime. |
| * Clobber list : x1, x2 |
| * --------------------------------------------- |
| */ |
| func plat_crash_console_putc |
| mov_imm x1, TEGRA_BOOT_UART_BASE |
| b console_core_putc |
| endfunc plat_crash_console_putc |
| |
| /* --------------------------------------------------- |
| * Function to handle a platform reset and store |
| * input parameters passed by BL2. |
| * --------------------------------------------------- |
| */ |
| func plat_reset_handler |
| |
| /* ----------------------------------- |
| * derive and save the phys_base addr |
| * ----------------------------------- |
| */ |
| adr x17, tegra_bl31_phys_base |
| ldr x18, [x17] |
| cbnz x18, 1f |
| adr x18, bl31_entrypoint |
| str x18, [x17] |
| |
| 1: cpu_init_common |
| |
| ret |
| endfunc plat_reset_handler |
| |
| /* ---------------------------------------- |
| * Secure entrypoint function for CPU boot |
| * ---------------------------------------- |
| */ |
| .align 6 |
| func tegra_secure_entrypoint |
| |
| #if ERRATA_TEGRA_INVALIDATE_BTB_AT_BOOT |
| |
| /* ------------------------------------------------------- |
| * Invalidate BTB along with I$ to remove any stale |
| * entries from the branch predictor array. |
| * ------------------------------------------------------- |
| */ |
| mrs x0, CPUACTLR_EL1 |
| orr x0, x0, #1 |
| msr CPUACTLR_EL1, x0 /* invalidate BTB and I$ together */ |
| dsb sy |
| isb |
| ic iallu /* actual invalidate */ |
| dsb sy |
| isb |
| |
| mrs x0, CPUACTLR_EL1 |
| bic x0, x0, #1 |
| msr CPUACTLR_EL1, X0 /* restore original CPUACTLR_EL1 */ |
| dsb sy |
| isb |
| |
| .rept 7 |
| nop /* wait */ |
| .endr |
| |
| /* ----------------------------------------------- |
| * Extract OSLK bit and check if it is '1'. This |
| * bit remains '0' for A53 on warm-resets. If '1', |
| * turn off regional clock gating and request warm |
| * reset. |
| * ----------------------------------------------- |
| */ |
| mrs x0, oslsr_el1 |
| and x0, x0, #2 |
| mrs x1, mpidr_el1 |
| bics xzr, x0, x1, lsr #7 /* 0 = slow cluster or warm reset */ |
| b.eq restore_oslock |
| mov x0, xzr |
| msr oslar_el1, x0 /* os lock stays 0 across warm reset */ |
| mov x3, #3 |
| movz x4, #0x8000, lsl #48 |
| msr CPUACTLR_EL1, x4 /* turn off RCG */ |
| isb |
| msr rmr_el3, x3 /* request warm reset */ |
| isb |
| dsb sy |
| 1: wfi |
| b 1b |
| |
| /* -------------------------------------------------- |
| * These nops are here so that speculative execution |
| * won't harm us before we are done with warm reset. |
| * -------------------------------------------------- |
| */ |
| .rept 65 |
| nop |
| .endr |
| |
| /* -------------------------------------------------- |
| * Do not insert instructions here |
| * -------------------------------------------------- |
| */ |
| #endif |
| |
| /* -------------------------------------------------- |
| * Restore OS Lock bit |
| * -------------------------------------------------- |
| */ |
| restore_oslock: |
| mov x0, #1 |
| msr oslar_el1, x0 |
| |
| cpu_init_common |
| |
| /* --------------------------------------------------------------------- |
| * The initial state of the Architectural feature trap register |
| * (CPTR_EL3) is unknown and it must be set to a known state. All |
| * feature traps are disabled. Some bits in this register are marked as |
| * Reserved and should not be modified. |
| * |
| * CPTR_EL3.TCPAC: This causes a direct access to the CPACR_EL1 from EL1 |
| * or the CPTR_EL2 from EL2 to trap to EL3 unless it is trapped at EL2. |
| * CPTR_EL3.TTA: This causes access to the Trace functionality to trap |
| * to EL3 when executed from EL0, EL1, EL2, or EL3. If system register |
| * access to trace functionality is not supported, this bit is RES0. |
| * CPTR_EL3.TFP: This causes instructions that access the registers |
| * associated with Floating Point and Advanced SIMD execution to trap |
| * to EL3 when executed from any exception level, unless trapped to EL1 |
| * or EL2. |
| * --------------------------------------------------------------------- |
| */ |
| mrs x1, cptr_el3 |
| bic w1, w1, #TCPAC_BIT |
| bic w1, w1, #TTA_BIT |
| bic w1, w1, #TFP_BIT |
| msr cptr_el3, x1 |
| |
| /* -------------------------------------------------- |
| * Get secure world's entry point and jump to it |
| * -------------------------------------------------- |
| */ |
| mrs x0, mpidr_el1 |
| bl platform_get_entrypoint |
| br x0 |
| endfunc tegra_secure_entrypoint |
| |
| .data |
| .align 3 |
| |
| /* -------------------------------------------------- |
| * Per-CPU Secure entry point - resume from suspend |
| * -------------------------------------------------- |
| */ |
| sec_entry_point: |
| .rept PLATFORM_CORE_COUNT |
| .quad 0 |
| .endr |
| |
| /* -------------------------------------------------- |
| * NS world's cold boot entry point |
| * -------------------------------------------------- |
| */ |
| ns_image_entrypoint: |
| .quad 0 |
| |
| /* -------------------------------------------------- |
| * BL31's physical base address |
| * -------------------------------------------------- |
| */ |
| tegra_bl31_phys_base: |
| .quad 0 |