96 lines
2.6 KiB
C
96 lines
2.6 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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/* 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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