| Yatharth Kochar | 2694cba | 2016-11-14 12:00:41 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2016, 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 | #include <arch.h> |
| 31 | #include <asm_macros.S> |
| 32 | #include <cpu_macros.S> |
| 33 | #include <css_def.h> |
| 34 | |
| 35 | .weak plat_secondary_cold_boot_setup |
| 36 | .weak plat_get_my_entrypoint |
| 37 | .globl css_calc_core_pos_swap_cluster |
| 38 | .weak plat_is_my_cpu_primary |
| 39 | |
| 40 | /* --------------------------------------------------------------------- |
| 41 | * void plat_secondary_cold_boot_setup(void); |
| 42 | * In the normal boot flow, cold-booting secondary |
| 43 | * CPUs is not yet implemented and they panic. |
| 44 | * --------------------------------------------------------------------- |
| 45 | */ |
| 46 | func plat_secondary_cold_boot_setup |
| 47 | /* TODO: Implement secondary CPU cold boot setup on CSS platforms */ |
| 48 | cb_panic: |
| 49 | b cb_panic |
| 50 | endfunc plat_secondary_cold_boot_setup |
| 51 | |
| 52 | /* --------------------------------------------------------------------- |
| 53 | * uintptr_t plat_get_my_entrypoint (void); |
| 54 | * |
| 55 | * Main job of this routine is to distinguish between a cold and a warm |
| 56 | * boot. On CSS platforms, this distinction is based on the contents of |
| 57 | * the Trusted Mailbox. It is initialised to zero by the SCP before the |
| 58 | * AP cores are released from reset. Therefore, a zero mailbox means |
| 59 | * it's a cold reset. |
| 60 | * |
| 61 | * This functions returns the contents of the mailbox, i.e.: |
| 62 | * - 0 for a cold boot; |
| 63 | * - the warm boot entrypoint for a warm boot. |
| 64 | * --------------------------------------------------------------------- |
| 65 | */ |
| 66 | func plat_get_my_entrypoint |
| 67 | ldr r0, =PLAT_ARM_TRUSTED_MAILBOX_BASE |
| 68 | ldr r0, [r0] |
| 69 | bx lr |
| 70 | endfunc plat_get_my_entrypoint |
| 71 | |
| 72 | /* ----------------------------------------------------------- |
| 73 | * unsigned int css_calc_core_pos_swap_cluster(u_register_t mpidr) |
| 74 | * Utility function to calculate the core position by |
| 75 | * swapping the cluster order. This is necessary in order to |
| 76 | * match the format of the boot information passed by the SCP |
| 77 | * and read in plat_is_my_cpu_primary below. |
| 78 | * ----------------------------------------------------------- |
| 79 | */ |
| 80 | func css_calc_core_pos_swap_cluster |
| 81 | and r1, r0, #MPIDR_CPU_MASK |
| 82 | and r0, r0, #MPIDR_CLUSTER_MASK |
| 83 | eor r0, r0, #(1 << MPIDR_AFFINITY_BITS) // swap cluster order |
| 84 | add r0, r1, r0, LSR #6 |
| 85 | bx lr |
| 86 | endfunc css_calc_core_pos_swap_cluster |
| 87 | |
| 88 | /* ----------------------------------------------------- |
| 89 | * unsigned int plat_is_my_cpu_primary (void); |
| 90 | * |
| 91 | * Find out whether the current cpu is the primary |
| 92 | * cpu (applicable ony after a cold boot) |
| 93 | * ----------------------------------------------------- |
| 94 | */ |
| 95 | func plat_is_my_cpu_primary |
| 96 | mov r10, lr |
| 97 | bl plat_my_core_pos |
| 98 | ldr r1, =SCP_BOOT_CFG_ADDR |
| 99 | ldr r1, [r1] |
| 100 | ubfx r1, r1, #PLAT_CSS_PRIMARY_CPU_SHIFT, \ |
| 101 | #PLAT_CSS_PRIMARY_CPU_BIT_WIDTH |
| 102 | cmp r0, r1 |
| 103 | moveq r0, #1 |
| 104 | movne r0, #0 |
| 105 | bx r10 |
| 106 | endfunc plat_is_my_cpu_primary |