| /* |
| * Copyright (c) 2013, ARM Limited. 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 <platform.h> |
| |
| |
| .globl pcpu_dv_mem_stack |
| .weak platform_get_core_pos |
| .weak platform_set_stack |
| .weak platform_is_primary_cpu |
| .weak platform_set_coherent_stack |
| .weak platform_check_mpidr |
| .weak plat_report_exception |
| |
| /* ----------------------------------------------------- |
| * 512 bytes of coherent stack for each cpu |
| * ----------------------------------------------------- |
| */ |
| #define PCPU_DV_MEM_STACK_SIZE 0x200 |
| |
| |
| .section .text, "ax"; .align 3 |
| |
| /* ----------------------------------------------------- |
| * unsigned long long platform_set_coherent_stack |
| * (unsigned mpidr); |
| * For a given mpidr, this function returns the stack |
| * pointer allocated in device memory. This stack can |
| * be used by C code which enables/disables the SCTLR.M |
| * SCTLR.C bit e.g. while powering down a cpu |
| * ----------------------------------------------------- |
| */ |
| platform_set_coherent_stack:; .type platform_set_coherent_stack, %function |
| mov x5, x30 // lr |
| bl platform_get_core_pos |
| add x0, x0, #1 |
| mov x1, #PCPU_DV_MEM_STACK_SIZE |
| mul x0, x0, x1 |
| ldr x1, =pcpu_dv_mem_stack |
| add sp, x1, x0 |
| ret x5 |
| |
| |
| /* ----------------------------------------------------- |
| * int platform_get_core_pos(int mpidr); |
| * With this function: CorePos = (ClusterId * 4) + |
| * CoreId |
| * ----------------------------------------------------- |
| */ |
| platform_get_core_pos:; .type platform_get_core_pos, %function |
| and x1, x0, #MPIDR_CPU_MASK |
| and x0, x0, #MPIDR_CLUSTER_MASK |
| add x0, x1, x0, LSR #6 |
| ret |
| |
| |
| /* ----------------------------------------------------- |
| * void platform_is_primary_cpu (unsigned int mpid); |
| * |
| * Given the mpidr say whether this cpu is the primary |
| * cpu (applicable ony after a cold boot) |
| * ----------------------------------------------------- |
| */ |
| platform_is_primary_cpu:; .type platform_is_primary_cpu, %function |
| and x0, x0, #(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK) |
| cmp x0, #PRIMARY_CPU |
| cset x0, eq |
| ret |
| |
| |
| /* ----------------------------------------------------- |
| * void platform_set_stack (int mpidr) |
| * ----------------------------------------------------- |
| */ |
| platform_set_stack:; .type platform_set_stack, %function |
| mov x9, x30 // lr |
| bl platform_get_core_pos |
| add x0, x0, #1 |
| mov x1, #PLATFORM_STACK_SIZE |
| mul x0, x0, x1 |
| ldr x1, =platform_normal_stacks |
| add sp, x1, x0 |
| ret x9 |
| |
| /* ----------------------------------------------------- |
| * Placeholder function which should be redefined by |
| * each platform. |
| * ----------------------------------------------------- |
| */ |
| platform_check_mpidr:; .type platform_check_mpidr, %function |
| mov x0, xzr |
| ret |
| |
| /* ----------------------------------------------------- |
| * Placeholder function which should be redefined by |
| * each platform. |
| * ----------------------------------------------------- |
| */ |
| plat_report_exception: |
| ret |
| |
| /* ----------------------------------------------------- |
| * Per-cpu stacks in device memory. |
| * Used for C code just before power down or right after |
| * power up when the MMU or caches need to be turned on |
| * or off. Each cpu gets a stack of 512 bytes. |
| * ----------------------------------------------------- |
| */ |
| .section tzfw_coherent_mem, "aw", %nobits; .align 6 |
| |
| pcpu_dv_mem_stack: |
| /* Zero fill */ |
| .space (PLATFORM_CORE_COUNT * PCPU_DV_MEM_STACK_SIZE), 0 |