diff options
Diffstat (limited to 'plat/hisilicon/poplar/aarch64/poplar_helpers.S')
| -rw-r--r-- | plat/hisilicon/poplar/aarch64/poplar_helpers.S | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/plat/hisilicon/poplar/aarch64/poplar_helpers.S b/plat/hisilicon/poplar/aarch64/poplar_helpers.S new file mode 100644 index 0000000..063ee64 --- /dev/null +++ b/plat/hisilicon/poplar/aarch64/poplar_helpers.S @@ -0,0 +1,87 @@ +/* + * Copyright (c) 2018-2020, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ +#include <asm_macros.S> +#include <platform_def.h> + + .globl plat_my_core_pos + .globl poplar_calc_core_pos + .globl plat_crash_console_init + .globl plat_crash_console_putc + .globl plat_crash_console_flush + .globl platform_mem_init + + /* ----------------------------------------------------- + * unsigned int plat_my_core_pos(void) + * This function uses poplar_calc_core_pos() + * definition to get the index of the calling CPU. + * ----------------------------------------------------- + */ +func plat_my_core_pos + mrs x0, mpidr_el1 + b poplar_calc_core_pos +endfunc plat_my_core_pos + + /* ----------------------------------------------------- + * unsigned int poplar_calc_core_pos(u_register_t mpidr) + * Helper function to calculate the core position. + * With this function: CorePos = (ClusterId * 4) + + * CoreId + * ----------------------------------------------------- + */ +func poplar_calc_core_pos + and x1, x0, #MPIDR_CPU_MASK + and x0, x0, #MPIDR_CLUSTER_MASK + add x0, x1, x0, LSR #6 + ret +endfunc poplar_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 : x0 - x4 + * --------------------------------------------- + */ +func plat_crash_console_init + mov_imm x0, POPLAR_CRASH_UART_BASE + mov_imm x1, POPLAR_CRASH_UART_CLK_IN_HZ + mov_imm x2, POPLAR_CONSOLE_BAUDRATE + b console_pl011_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 : x1, x2 + * --------------------------------------------- + */ +func plat_crash_console_putc + mov_imm x1, POPLAR_CRASH_UART_BASE + b console_pl011_core_putc +endfunc plat_crash_console_putc + + /* --------------------------------------------- + * void plat_crash_console_flush() + * Function to force a write of all buffered + * data that hasn't been output. + * Out : void. + * Clobber list : r0 + * --------------------------------------------- + */ +func plat_crash_console_flush + mov_imm x0, POPLAR_CRASH_UART_BASE + b console_pl011_core_flush +endfunc plat_crash_console_flush + + /* --------------------------------------------------------------------- + * We don't need to carry out any memory initialization on ARM + * platforms. The Secure RAM is accessible straight away. + * --------------------------------------------------------------------- + */ +func platform_mem_init + ret +endfunc platform_mem_init |