| Andrew Thoelke | 65668f9 | 2014-03-20 10:48:23 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2014, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions are met: |
| 6 | * |
| 7 | * Redistributions of source code must retain the above copyright notice, this |
| 8 | * list of conditions and the following disclaimer. |
| 9 | * |
| 10 | * Redistributions in binary form must reproduce the above copyright notice, |
| 11 | * this list of conditions and the following disclaimer in the documentation |
| 12 | * and/or other materials provided with the distribution. |
| 13 | * |
| 14 | * Neither the name of ARM nor the names of its contributors may be used |
| 15 | * to endorse or promote products derived from this software without specific |
| 16 | * prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| 22 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 23 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 24 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 26 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 28 | * POSSIBILITY OF SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #include <arch.h> |
| Andrew Thoelke | 65668f9 | 2014-03-20 10:48:23 +0000 | [diff] [blame] | 32 | #include <asm_macros.S> |
| Dan Handley | ed6ff95 | 2014-05-14 17:44:19 +0100 | [diff] [blame] | 33 | #include <platform_def.h> |
| Andrew Thoelke | 65668f9 | 2014-03-20 10:48:23 +0000 | [diff] [blame] | 34 | |
| 35 | |
| 36 | .local pcpu_dv_mem_stack |
| 37 | .local platform_normal_stacks |
| 38 | .weak platform_set_stack |
| 39 | .weak platform_get_stack |
| 40 | .weak platform_set_coherent_stack |
| 41 | |
| 42 | |
| 43 | /* ----------------------------------------------------- |
| 44 | * void platform_set_coherent_stack (unsigned long mpidr) |
| 45 | * |
| 46 | * For a given CPU, this function sets the stack pointer |
| 47 | * to a stack allocated in device memory. This stack can |
| 48 | * be used by C code which enables/disables the SCTLR.M |
| 49 | * SCTLR.C bit e.g. while powering down a cpu |
| 50 | * ----------------------------------------------------- |
| 51 | */ |
| 52 | func platform_set_coherent_stack |
| 53 | mov x5, x30 // lr |
| 54 | get_mp_stack pcpu_dv_mem_stack, PCPU_DV_MEM_STACK_SIZE |
| 55 | mov sp, x0 |
| 56 | ret x5 |
| 57 | |
| 58 | /* ----------------------------------------------------- |
| 59 | * unsigned long platform_get_stack (unsigned long mpidr) |
| 60 | * |
| 61 | * For a given CPU, this function returns the stack |
| 62 | * pointer for a stack allocated in device memory. |
| 63 | * ----------------------------------------------------- |
| 64 | */ |
| 65 | func platform_get_stack |
| 66 | mov x10, x30 // lr |
| 67 | get_mp_stack platform_normal_stacks, PLATFORM_STACK_SIZE |
| 68 | ret x10 |
| 69 | |
| 70 | /* ----------------------------------------------------- |
| 71 | * void platform_set_stack (unsigned long mpidr) |
| 72 | * |
| 73 | * For a given CPU, this function sets the stack pointer |
| 74 | * to a stack allocated in normal memory. |
| 75 | * ----------------------------------------------------- |
| 76 | */ |
| 77 | func platform_set_stack |
| 78 | mov x9, x30 // lr |
| 79 | bl platform_get_stack |
| 80 | mov sp, x0 |
| 81 | ret x9 |
| 82 | |
| 83 | /* ----------------------------------------------------- |
| 84 | * Per-cpu stacks in normal memory. |
| 85 | * Used for C code during runtime execution (when coherent |
| 86 | * stacks are not required). |
| 87 | * Each cpu gets a stack of PLATFORM_STACK_SIZE bytes. |
| 88 | * ----------------------------------------------------- |
| 89 | */ |
| 90 | declare_stack platform_normal_stacks, tzfw_normal_stacks, \ |
| 91 | PLATFORM_STACK_SIZE, PLATFORM_CORE_COUNT |
| 92 | |
| 93 | /* ----------------------------------------------------- |
| 94 | * Per-cpu stacks in device memory. |
| 95 | * Used for C code just before power down or right after |
| 96 | * power up when the MMU or caches need to be turned on |
| 97 | * or off. |
| 98 | * Each cpu gets a stack of PCPU_DV_MEM_STACK_SIZE bytes. |
| 99 | * ----------------------------------------------------- |
| 100 | */ |
| 101 | declare_stack pcpu_dv_mem_stack, tzfw_coherent_mem, \ |
| 102 | PCPU_DV_MEM_STACK_SIZE, PLATFORM_CORE_COUNT |