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Diffstat (limited to '')
| -rw-r--r-- | plat/socionext/synquacer/sq_helpers.S | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/plat/socionext/synquacer/sq_helpers.S b/plat/socionext/synquacer/sq_helpers.S new file mode 100644 index 0000000..5f9eab4 --- /dev/null +++ b/plat/socionext/synquacer/sq_helpers.S @@ -0,0 +1,115 @@ +/* + * Copyright (c) 2018-2022, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <arch.h> +#include <asm_macros.S> +#include <assert_macros.S> +#include <platform_def.h> + + .global sq_calc_core_pos + .global plat_my_core_pos + .global platform_mem_init + .global plat_is_my_cpu_primary + .global plat_secondary_cold_boot_setup + .global plat_crash_console_init + .global plat_crash_console_putc + .global plat_crash_console_flush + +/* + * unsigned int sq_calc_core_pos(u_register_t mpidr) + * core_pos = (cluster_id * max_cpus_per_cluster) + core_id + */ +func sq_calc_core_pos + and x1, x0, #MPIDR_CPU_MASK + and x0, x0, #MPIDR_CLUSTER_MASK + add x0, x1, x0, lsr #7 + ret +endfunc sq_calc_core_pos + +func plat_my_core_pos + mrs x0, mpidr_el1 + b sq_calc_core_pos +endfunc plat_my_core_pos + +func platform_mem_init + ret +endfunc platform_mem_init + +/* + * Secondary CPUs are placed in a holding pen, waiting for their mailbox + * to be populated. Note that all CPUs share the same mailbox ; therefore, + * populating it will release all CPUs from their holding pen. If + * finer-grained control is needed then this should be handled in the + * code that secondary CPUs jump to. + */ +func plat_secondary_cold_boot_setup +#if !RESET_TO_BL31 + mov_imm x0, BL2_MAILBOX_BASE + ldr x0, [x0] +#else + ldr x0, sq_sec_entrypoint +#endif + + /* Wait until the mailbox gets populated */ +poll_mailbox: + cbz x0, 1f + br x0 +1: + wfe + b poll_mailbox +endfunc plat_secondary_cold_boot_setup + +/* + * Find out whether the current cpu is the primary + * cpu (applicable only after a cold boot) + */ +func plat_is_my_cpu_primary + mov x9, x30 + bl plat_my_core_pos + ldr x1, =SQ_BOOT_CFG_ADDR + ldr x1, [x1] + ubfx x1, x1, #PLAT_SQ_PRIMARY_CPU_SHIFT, \ + #PLAT_SQ_PRIMARY_CPU_BIT_WIDTH + cmp x0, x1 + cset w0, eq + ret x9 +endfunc plat_is_my_cpu_primary + +/* + * int plat_crash_console_init(void) + * Function to initialize the crash console + * without a C Runtime to print crash report. + * Clobber list : x0, x1, x2 + */ +func plat_crash_console_init + mov_imm x0, PLAT_SQ_BOOT_UART_BASE + mov_imm x1, PLAT_SQ_BOOT_UART_CLK_IN_HZ + mov_imm x2, SQ_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, PLAT_SQ_BOOT_UART_BASE + b console_pl011_core_putc +endfunc plat_crash_console_putc + +/* + * void plat_crash_console_flush(int c) + * Function to force a write of all buffered + * data that hasn't been output. + * Out : void. + * Clobber list : x0, x1 + */ +func plat_crash_console_flush + mov_imm x0, PLAT_SQ_BOOT_UART_BASE + b console_pl011_core_flush +endfunc plat_crash_console_flush |