mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-06 03:06:16 +09:00
f539c8a4a7
Early MMU improves performance especially on emulators. However, the early MMU is left enabled after the first stage of SPL boot. Instead of flushing D-cache and dealing with re-enabling MMU for the second stage U-Boot, disabling it for SPL build simplifies the process. The performance penalty is unnoticeable on the real hardware. As of now, SPL boot is not supported by existing emulators. So this should have no impact on emulators. Signed-off-by: York Sun <york.sun@nxp.com>
63 lines
1008 B
C
63 lines
1008 B
C
/*
|
|
* Copyright 2014-2015 Freescale Semiconductor, Inc.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <spl.h>
|
|
#include <asm/io.h>
|
|
#include <fsl_ifc.h>
|
|
#include <i2c.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
u32 spl_boot_device(void)
|
|
{
|
|
#ifdef CONFIG_SPL_MMC_SUPPORT
|
|
return BOOT_DEVICE_MMC1;
|
|
#endif
|
|
#ifdef CONFIG_SPL_NAND_SUPPORT
|
|
return BOOT_DEVICE_NAND;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
u32 spl_boot_mode(const u32 boot_device)
|
|
{
|
|
switch (spl_boot_device()) {
|
|
case BOOT_DEVICE_MMC1:
|
|
#ifdef CONFIG_SPL_FAT_SUPPORT
|
|
return MMCSD_MODE_FS;
|
|
#else
|
|
return MMCSD_MODE_RAW;
|
|
#endif
|
|
case BOOT_DEVICE_NAND:
|
|
return 0;
|
|
default:
|
|
puts("spl: error: unsupported device\n");
|
|
hang();
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_SPL_BUILD
|
|
void board_init_f(ulong dummy)
|
|
{
|
|
/* Clear global data */
|
|
memset((void *)gd, 0, sizeof(gd_t));
|
|
board_early_init_f();
|
|
timer_init();
|
|
#ifdef CONFIG_LS2080A
|
|
env_init();
|
|
#endif
|
|
get_clocks();
|
|
|
|
preloader_console_init();
|
|
|
|
#ifdef CONFIG_SPL_I2C_SUPPORT
|
|
i2c_init_all();
|
|
#endif
|
|
dram_init();
|
|
}
|
|
#endif
|