M7350/bootable/bootloader/lk/platform/armemu/blkdev.c
2024-09-09 08:52:07 +00:00

89 lines
2.7 KiB
C

/*
* Copyright (c) 2010 Travis Geiselbrecht
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <err.h>
#include <debug.h>
#include <platform.h>
#include "platform_p.h"
#include <platform/armemu.h>
#include <lib/bio.h>
#include <reg.h>
static bdev_t dev;
static uint64_t get_blkdev_len(void)
{
return *REG64(BDEV_LEN);
}
ssize_t read_block(struct bdev *dev, void *buf, bnum_t block, uint count)
{
/* assume args have been validated by layer above */
*REG32(BDEV_CMD_ADDR) = (uint32_t)buf;
*REG64(BDEV_CMD_OFF) = (uint64_t)((uint64_t)block * dev->block_size);
*REG32(BDEV_CMD_LEN) = count * dev->block_size;
*REG32(BDEV_CMD) = BDEV_CMD_READ;
uint32_t err = *REG32(BDEV_CMD) & BDEV_CMD_ERRMASK;
if (err == BDEV_CMD_ERR_NONE)
return count * dev->block_size;
else
return ERR_IO;
}
ssize_t write_block(struct bdev *dev, const void *buf, bnum_t block, uint count)
{
/* assume args have been validated by layer above */
*REG32(BDEV_CMD_ADDR) = (uint32_t)buf;
*REG64(BDEV_CMD_OFF) = (uint64_t)((uint64_t)block * dev->block_size);
*REG32(BDEV_CMD_LEN) = count * dev->block_size;
*REG32(BDEV_CMD) = BDEV_CMD_WRITE;
uint32_t err = *REG32(BDEV_CMD) & BDEV_CMD_ERRMASK;
if (err == BDEV_CMD_ERR_NONE)
return count * dev->block_size;
else
return ERR_IO;
}
void platform_init_blkdev(void)
{
if ((*REG32(SYSINFO_FEATURES) & SYSINFO_FEATURE_BLOCKDEV) == 0)
return; // no block device
TRACEF("device len %lld\n", get_blkdev_len());
if (get_blkdev_len() == 0)
return;
bio_initialize_bdev(&dev, "block0", 512, get_blkdev_len() / 512);
// fill in hooks
dev.read_block = &read_block;
dev.write_block = &write_block;
bio_register_device(&dev);
}