/* SPDX-License-Identifier: GPL-2.0-only */ #include <assert.h> #include <commonlib/bsd/helpers.h> #include <device/mmio.h> #include <types.h> /* Helper functions for various MMIO access patterns. */ void buffer_from_fifo32(void *buffer, size_t size, void *fifo, int fifo_stride, int fifo_width) { u8 *p = buffer; int i, j; assert(fifo_width > 0 && fifo_width <= sizeof(u32) && fifo_stride % sizeof(u32) == 0); for (i = 0; i < size; i += fifo_width, fifo += fifo_stride) { u32 val = read32(fifo); for (j = 0; j < MIN(size - i, fifo_width); j++) *p++ = (u8)(val >> (j * 8)); } } void buffer_to_fifo32_prefix(const void *buffer, u32 prefix, int prefsz, size_t size, void *fifo, int fifo_stride, int fifo_width) { const u8 *p = buffer; int i, j = prefsz; assert(fifo_width > 0 && fifo_width <= sizeof(u32) && fifo_stride % sizeof(u32) == 0 && prefsz <= fifo_width); uint32_t val = prefix; for (i = 0; i < size; i += fifo_width, fifo += fifo_stride) { for (; j < MIN(size - i, fifo_width); j++) val |= *p++ << (j * 8); write32(fifo, val); val = 0; j = 0; } }