diff options
Diffstat (limited to 'services/std_svc/psci1.0/psci_helpers.S')
| -rw-r--r-- | services/std_svc/psci1.0/psci_helpers.S | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/services/std_svc/psci1.0/psci_helpers.S b/services/std_svc/psci1.0/psci_helpers.S deleted file mode 100644 index bbfa5d5d..00000000 --- a/services/std_svc/psci1.0/psci_helpers.S +++ /dev/null @@ -1,154 +0,0 @@ -/* - * Copyright (c) 2014-2015, 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 <asm_macros.S> -#include <assert_macros.S> -#include <platform_def.h> -#include <psci.h> - - .globl psci_do_pwrdown_cache_maintenance - .globl psci_do_pwrup_cache_maintenance - -/* ----------------------------------------------------------------------- - * void psci_do_pwrdown_cache_maintenance(uint32_t power level); - * - * This function performs cache maintenance for the specified power - * level. The levels of cache affected are determined by the power - * level which is passed as the argument i.e. level 0 results - * in a flush of the L1 cache. Both the L1 and L2 caches are flushed - * for a higher power level. - * - * Additionally, this function also ensures that stack memory is correctly - * flushed out to avoid coherency issues due to a change in its memory - * attributes after the data cache is disabled. - * ----------------------------------------------------------------------- - */ -func psci_do_pwrdown_cache_maintenance - stp x29, x30, [sp,#-16]! - stp x19, x20, [sp,#-16]! - - /* --------------------------------------------- - * Determine to how many levels of cache will be - * subject to cache maintenance. Power level - * 0 implies that only the cpu is being powered - * down. Only the L1 data cache needs to be - * flushed to the PoU in this case. For a higher - * power level we are assuming that a flush - * of L1 data and L2 unified cache is enough. - * This information should be provided by the - * platform. - * --------------------------------------------- - */ - cmp x0, #PSCI_CPU_PWR_LVL - b.eq do_core_pwr_dwn - bl prepare_cluster_pwr_dwn - b do_stack_maintenance - -do_core_pwr_dwn: - bl prepare_core_pwr_dwn - - /* --------------------------------------------- - * Do stack maintenance by flushing the used - * stack to the main memory and invalidating the - * remainder. - * --------------------------------------------- - */ -do_stack_maintenance: - bl plat_get_my_stack - - /* --------------------------------------------- - * Calculate and store the size of the used - * stack memory in x1. - * --------------------------------------------- - */ - mov x19, x0 - mov x1, sp - sub x1, x0, x1 - mov x0, sp - bl flush_dcache_range - - /* --------------------------------------------- - * Calculate and store the size of the unused - * stack memory in x1. Calculate and store the - * stack base address in x0. - * --------------------------------------------- - */ - sub x0, x19, #PLATFORM_STACK_SIZE - sub x1, sp, x0 - bl inv_dcache_range - - ldp x19, x20, [sp], #16 - ldp x29, x30, [sp], #16 - ret -endfunc psci_do_pwrdown_cache_maintenance - - -/* ----------------------------------------------------------------------- - * void psci_do_pwrup_cache_maintenance(void); - * - * This function performs cache maintenance after this cpu is powered up. - * Currently, this involves managing the used stack memory before turning - * on the data cache. - * ----------------------------------------------------------------------- - */ -func psci_do_pwrup_cache_maintenance - stp x29, x30, [sp,#-16]! - - /* --------------------------------------------- - * Ensure any inflight stack writes have made it - * to main memory. - * --------------------------------------------- - */ - dmb st - - /* --------------------------------------------- - * Calculate and store the size of the used - * stack memory in x1. Calculate and store the - * stack base address in x0. - * --------------------------------------------- - */ - bl plat_get_my_stack - mov x1, sp - sub x1, x0, x1 - mov x0, sp - bl inv_dcache_range - - /* --------------------------------------------- - * Enable the data cache. - * --------------------------------------------- - */ - mrs x0, sctlr_el3 - orr x0, x0, #SCTLR_C_BIT - msr sctlr_el3, x0 - isb - - ldp x29, x30, [sp], #16 - ret -endfunc psci_do_pwrup_cache_maintenance |