diff options
Diffstat (limited to 'plat/arm/common/aarch32/arm_helpers.S')
| -rw-r--r-- | plat/arm/common/aarch32/arm_helpers.S | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/plat/arm/common/aarch32/arm_helpers.S b/plat/arm/common/aarch32/arm_helpers.S new file mode 100644 index 00000000..f56b2153 --- /dev/null +++ b/plat/arm/common/aarch32/arm_helpers.S @@ -0,0 +1,77 @@ +/* + * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ +#include <asm_macros.S> +#include <platform_def.h> + + .weak plat_arm_calc_core_pos + .weak plat_my_core_pos + .globl plat_crash_console_init + .globl plat_crash_console_putc + .globl plat_crash_console_flush + + /* ----------------------------------------------------- + * unsigned int plat_my_core_pos(void) + * This function uses the plat_arm_calc_core_pos() + * definition to get the index of the calling CPU. + * ----------------------------------------------------- + */ +func plat_my_core_pos + ldcopr r0, MPIDR + b plat_arm_calc_core_pos +endfunc plat_my_core_pos + + /* ----------------------------------------------------- + * unsigned int plat_arm_calc_core_pos(uint64_t mpidr) + * Helper function to calculate the core position. + * With this function: CorePos = (ClusterId * 4) + + * CoreId + * ----------------------------------------------------- + */ +func plat_arm_calc_core_pos + and r1, r0, #MPIDR_CPU_MASK + and r0, r0, #MPIDR_CLUSTER_MASK + add r0, r1, r0, LSR #6 + bx lr +endfunc plat_arm_calc_core_pos + + /* --------------------------------------------- + * int plat_crash_console_init(void) + * Function to initialize the crash console + * without a C Runtime to print crash report. + * Clobber list : r0 - r3 + * --------------------------------------------- + */ +func plat_crash_console_init + ldr r0, =PLAT_ARM_CRASH_UART_BASE + ldr r1, =PLAT_ARM_CRASH_UART_CLK_IN_HZ + ldr r2, =ARM_CONSOLE_BAUDRATE + b console_core_init +endfunc plat_crash_console_init + + /* --------------------------------------------- + * int plat_crash_console_putc(int c) + * Function to print a character on the crash + * console without a C Runtime. + * Clobber list : r1 - r2 + * --------------------------------------------- + */ +func plat_crash_console_putc + ldr r1, =PLAT_ARM_CRASH_UART_BASE + b console_core_putc +endfunc plat_crash_console_putc + + /* --------------------------------------------- + * int plat_crash_console_flush() + * Function to force a write of all buffered + * data that hasn't been output. + * Out : return -1 on error else return 0. + * Clobber list : r0 - r1 + * --------------------------------------------- + */ +func plat_crash_console_flush + ldr r1, =PLAT_ARM_CRASH_UART_BASE + b console_core_flush +endfunc plat_crash_console_flush |