d56964cc2b
Two helpers (_init_clocktree and _init_uart2) already existed in the SPL and are copied verbatim from there. The SPL versions are still present and will be removed when dual boot works from the main bootloader. The other two helpers (_cleanup and _load_pdma_fw) are new. Change-Id: I4661667966e26f52e6c5142f1947d2a34b7008ef
105 lines
3 KiB
C
105 lines
3 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2021 Aidan MacDonald
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef __BOOT_X1000_H__
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#define __BOOT_X1000_H__
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#include "x1000/cpm.h"
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#include <stdbool.h>
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#include <stdint.h>
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#include <stddef.h>
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enum {
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BOOT_OPTION_ROCKBOX = 0,
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BOOT_OPTION_OFW_PLAYER,
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BOOT_OPTION_OFW_RECOVERY,
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};
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enum {
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/* 3 bits to store the boot option selected by the SPL */
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BOOT_OPTION_MASK = 0x7,
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BOOT_OPTION_SHIFT = 0,
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/* Set after running clk_init() and setting up system clocks */
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BOOT_FLAG_CLK_INIT = (1 << 31),
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/* Set by the SPL if it was loaded over USB boot */
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BOOT_FLAG_USB_BOOT = (1 << 30),
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};
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void x1000_boot_rockbox(const void* source, size_t length)
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__attribute__((section(".icode")));
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void x1000_boot_linux(const void* source, size_t length,
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void* load, void* entry, const char* args)
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__attribute__((section(".icode")));
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/* dual boot support code */
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void x1000_dualboot_cleanup(void);
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void x1000_dualboot_init_clocktree(void);
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void x1000_dualboot_init_uart2(void);
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int x1000_dualboot_load_pdma_fw(void);
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/* Note: these functions are inlined to minimize SPL code size.
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* They are private to the X1000 early boot code anyway... */
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static inline void cpm_scratch_set(uint32_t value)
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{
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/* TODO: see if this holds its state over a WDT reset */
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REG_CPM_SCRATCH_PROT = 0x5a5a;
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REG_CPM_SCRATCH = value;
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REG_CPM_SCRATCH_PROT = 0xa5a5;
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}
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static inline void init_boot_flags(void)
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{
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cpm_scratch_set(0);
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}
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static inline bool get_boot_flag(uint32_t bit)
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{
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return (REG_CPM_SCRATCH & bit) != 0;
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}
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static inline void set_boot_flag(uint32_t bit)
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{
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cpm_scratch_set(REG_CPM_SCRATCH | bit);
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}
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static inline void clr_boot_flag(uint32_t bit)
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{
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cpm_scratch_set(REG_CPM_SCRATCH & ~bit);
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}
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static inline void set_boot_option(int opt)
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{
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uint32_t r = REG_CPM_SCRATCH;
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r &= ~(BOOT_OPTION_MASK << BOOT_OPTION_SHIFT);
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r |= (opt & BOOT_OPTION_MASK) << BOOT_OPTION_SHIFT;
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cpm_scratch_set(r);
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}
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static inline int get_boot_option(void)
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{
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uint32_t r = REG_CPM_SCRATCH;
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return (r >> BOOT_OPTION_SHIFT) & BOOT_OPTION_MASK;
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}
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#endif /* __BOOT_X1000_H__ */
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