1450 lines
48 KiB
C
1450 lines
48 KiB
C
//*****************************************************************************
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//
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// am_hal_flash.c
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//! @file
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//!
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//! @brief Functions for performing Flash operations.
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//!
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//! @addtogroup flash2 Flash
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//! @ingroup apollo2hal
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//!
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//! IMPORTANT: Interrupts are active during execution of all HAL flash
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//! functions. If an interrupt occurs during execution of a flash function
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//! that programs or erases flash or INFO space, errors will occur if the
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//! interrupt service routine (ISR) is located in on-chip flash.
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//! If interrupts are expected during execution of a flash function that
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//! programs or erases either flash or INFO space:
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//! - Interrupts must be disabled via a critical section handler prior to
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//! calling the flash function.
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//! - Alternatively, applicable ISRs must be located in non-flash address space
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//! (i.e. SRAM, off-chip ROM, etc.).
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//!
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//! @{
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//
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//*****************************************************************************
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//*****************************************************************************
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//
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// Copyright (c) 2017, Ambiq Micro
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its
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// contributors may be used to endorse or promote products derived from this
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// software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// This is part of revision 1.2.9 of the AmbiqSuite Development Package.
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//
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//*****************************************************************************
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#include <stdint.h>
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#include <stdbool.h>
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#include "am_mcu_apollo.h"
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//
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// Look-up table
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//
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g_am_hal_flash_t g_am_hal_flash =
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{
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//
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// The basics.
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//
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// flash_mass_erase()
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((int (*) (uint32_t, uint32_t)) 0x0800004d),
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// flash_page_erase()
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((int (*) (uint32_t, uint32_t, uint32_t)) 0x08000051),
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// flash_program_main()
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((int (*) (uint32_t, uint32_t *, uint32_t *, uint32_t)) 0x08000055),
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// flash_program_info()
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((int (*) (uint32_t, uint32_t, uint32_t *, uint32_t, uint32_t)) 0x08000059),
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//
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// Non-blocking variants, but be careful these are not interrupt safe so
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// mask interrupts while these very long operations proceed.
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//
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// flash_mass_erase_nb()
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((int (*)(uint32_t, uint32_t)) 0x0800006d),
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// flash_page_erase_nb()
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((int (*)(uint32_t, uint32_t, uint32_t)) 0x08000071),
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// flash_nb_operation_complete()
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((bool (*)(void)) 0x0800007d),
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//
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// Essentially these are recovery options.
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//
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// flash_erase_info()
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((int (*)(uint32_t, uint32_t)) 0x08000081),
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// flash_erase_main_plus_info()
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((int (*)(uint32_t, uint32_t)) 0x08000089),
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// flash_erase_main_plus_info_both_instances()
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((int (*)(uint32_t)) 0x08000091),
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// flash_recovery()
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((void (*)(uint32_t)) 0x08000099),
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//
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// Useful utilities.
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//
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// flash_util_read_word()
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((uint32_t (*)(uint32_t*)) 0x08000075),
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// flash_util_write_word()
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((void (*)(uint32_t*, uint32_t)) 0x08000079),
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// delay_cycles()
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((void (*)(uint32_t)) 0x0800009d),
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//
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// The following functions pointers must never be called from user
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// programs. They are here primarily to document these entry points
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// which are usable from a debugger or debugger script.
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//
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// flash_program_main_sram()
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((void (*) (void)) 0x0800005d),
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// flash_program_info_sram()
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((void (*) (void)) 0x08000061),
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// flash_erase_main_pages_sram()
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((void (*) (void)) 0x08000065),
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// flash_mass_erase_sram()
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((void (*) (void)) 0x08000069),
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// flash_erase_info_sram()
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((void (*)(void)) 0x08000085),
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// flash_erase_main_plus_info_sram()
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((void (*)(void)) 0x0800008d)
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};
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//*****************************************************************************
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//
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//! @brief This function performs a mass erase on a flash instance.
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//!
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//! @param ui32Value - The flash program key.
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//! @param ui32FlashInst - The flash instance to erase.
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//!
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//! This function will erase the desired instance of flash.
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//!
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//! @note For Apollo2, each flash instance contains a maximum of 512KB.
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//!
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//! @note Interrupts are active during execution of this function. Any interrupt
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//! taken could cause execution errors. Please see the IMPORTANT note under
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//! Detailed Description above for more details.
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//!
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//! @return 0 for success, non-zero for failure.
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//
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//*****************************************************************************
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int
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am_hal_flash_mass_erase(uint32_t ui32Value, uint32_t ui32FlashInst)
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{
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return g_am_hal_flash.flash_mass_erase(ui32Value, ui32FlashInst);
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}
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//*****************************************************************************
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//
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//! @brief This function performs a page erase on a flash instance.
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//!
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//! @param ui32Value - The flash program key.
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//! @param ui32FlashInst - The flash instance to reference the page number with.
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//! @param ui32PageNum - The flash page relative to the specified instance.
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//!
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//! This function will erase the desired flash page in the desired instance of
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//! flash.
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//!
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//! @note For Apollo2, each flash page is 8KB (or AM_HAL_FLASH_PAGE_SIZE).
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//! Each flash instance contains a maximum of 64 pages (or
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//! AM_HAL_FLASH_INSTANCE_PAGES).
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//!
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//! @note When given an absolute flash address, a couple of helpful macros can
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//! be utilized when calling this function.
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//! For example:
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//! am_hal_flash_page_erase(AM_HAL_FLASH_PROGRAM_KEY,
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//! AM_HAL_FLASH_ADDR2INST(ui32Addr),
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//! AM_HAL_FLASH_ADDR2PAGE(ui32Addr) );
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//!
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//! @note Interrupts are active during execution of this function. Any interrupt
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//! taken could cause execution errors. Please see the IMPORTANT note under
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//! Detailed Description above for more details.
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//!
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//! @return 0 for success, non-zero for failure.
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//
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//*****************************************************************************
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int
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am_hal_flash_page_erase(uint32_t ui32Value, uint32_t ui32FlashInst,
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uint32_t ui32PageNum)
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{
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return g_am_hal_flash.flash_page_erase(ui32Value,
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ui32FlashInst,
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ui32PageNum);
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}
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//*****************************************************************************
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//
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//! @brief This programs up to N words of the Main array on one flash instance.
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//!
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//! @param ui32Value - The programming key, AM_HAL_FLASH_PROGRAM_KEY.
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//! @param pui32Src - Pointer to word aligned array of data to program into
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//! the flash instance.
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//! @param pui32Dst - Pointer to the word aligned flash location where
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//! programming of the flash instance is to begin.
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//! @param ui32NumWords - The number of words to be programmed.
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//!
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//! This function will program multiple words in main flash.
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//!
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//! @note Interrupts are active during execution of this function. Any interrupt
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//! taken could cause execution errors. Please see the IMPORTANT note under
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//! Detailed Description above for more details.
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//!
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//! @return 0 for success, non-zero for failure.
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//
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//*****************************************************************************
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int
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am_hal_flash_program_main(uint32_t ui32Value, uint32_t *pui32Src,
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uint32_t *pui32Dst, uint32_t ui32NumWords)
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{
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return g_am_hal_flash.flash_program_main(ui32Value, pui32Src,
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pui32Dst, ui32NumWords);
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}
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//*****************************************************************************
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//
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//! @brief This function programs multiple words in the customer INFO space.
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//!
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//! @param ui32Value - The customer INFO space key.
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//! @param ui32InfoInst - The INFO space instance, 0 or 1.
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//! @param *pui32Src - Pointer to word aligned array of data to program into
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//! the customer INFO space.
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//! @param ui32Offset - Word offset into customer INFO space (offset of 0 is
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//! the first word, 1 is second word, etc.).
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//! @param ui32NumWords - The number of words to be programmed, must not
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//! exceed AM_HAL_FLASH_INFO_SIZE/4.
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//!
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//! This function will program multiple words in the customer INFO space.
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//!
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//! @note Interrupts are active during execution of this function. Any interrupt
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//! taken could cause execution errors. Please see the IMPORTANT note under
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//! Detailed Description above for more details.
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//!
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//! @return 0 for success, non-zero for failure.
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//
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//*****************************************************************************
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int
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am_hal_flash_program_info(uint32_t ui32Value, uint32_t ui32InfoInst,
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uint32_t *pui32Src, uint32_t ui32Offset,
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uint32_t ui32NumWords)
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{
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return g_am_hal_flash.flash_program_info(ui32Value, 0, pui32Src,
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ui32Offset, ui32NumWords);
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}
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//*****************************************************************************
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//
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//! @brief This function erases an instance of the customer INFO space.
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//!
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//! @param ui32ProgramKey - The customer INFO space programming key
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//! (AM_HAL_FLASH_PROGRAM_KEY).
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//! @param ui32Inst - The flash instance, either 0 or 1.
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//!
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//! This function will erase the the customer INFO space of the specified
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//! instance.
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//!
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//! @note Interrupts are active during execution of this function. Any interrupt
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//! taken could cause execution errors. Please see the IMPORTANT note under
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//! Detailed Description above for more details.
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//!
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//! @return 0 for success, non-zero for failure.
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//
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//*****************************************************************************
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int
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am_hal_flash_erase_info(uint32_t ui32ProgramKey,
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uint32_t ui32Inst)
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{
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return g_am_hal_flash.flash_erase_info(ui32ProgramKey, ui32Inst);
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}
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//*****************************************************************************
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//
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//! @brief This function erases the main instance + the customer INFO space.
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//!
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//! @param ui32ProgramKey - The customer INFO space key.
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//! @param ui32Inst - The flash instance, either 0 or 1.
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//!
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//! This function will erase the main flash + the customer INFO space of the
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//! specified instance.
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//!
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//! @note Interrupts are active during execution of this function. Any interrupt
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//! taken could cause execution errors. Please see the IMPORTANT note under
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//! Detailed Description above for more details.
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//!
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//! @return 0 for success, non-zero for failure.
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//
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//*****************************************************************************
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int
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am_hal_flash_erase_main_plus_info(uint32_t ui32ProgramKey,
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uint32_t ui32Inst)
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{
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return g_am_hal_flash.flash_erase_main_plus_info(ui32ProgramKey,
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ui32Inst);
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}
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//*****************************************************************************
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//
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//! @brief This function erases the main flash + the customer INFO space.
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//!
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//! @param ui32ProgramKey - The customer INFO space key.
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//!
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//! This function will erase both instances the main flash + the
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//! customer INFO space.
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//!
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//! @note Interrupts are active during execution of this function. Any interrupt
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//! taken could cause execution errors. Please see the IMPORTANT note under
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//! Detailed Description above for more details.
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//!
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//! @return 0 for success, non-zero for failure.
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//
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//*****************************************************************************
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int
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am_hal_flash_erase_main_plus_info_both_instances(uint32_t ui32ProgramKey)
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{
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return g_am_hal_flash.flash_erase_main_plus_info_both_instances(
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ui32ProgramKey);
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}
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//*****************************************************************************
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//
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//! @brief This function erases both main flash instances + both customer INFO
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//! space instances.
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//!
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//! @param ui32RecoveryKey - The recovery key.
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//!
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//! This function erases both main instances and both customer INFOinstances
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//! even if the customer INFO space is programmed to not be erasable. This
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//! function completely erases the flash main and info instances and wipes the
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//! SRAM. Upon completion of the erasure operations, it does a POI (power on
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//! initialization) reset.
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//!
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//! @note Interrupts are active during execution of this function. Any interrupt
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//! taken could cause execution errors. Please see the IMPORTANT note under
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//! Detailed Description above for more details.
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//!
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//! @return Never Returns!!!
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//
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//*****************************************************************************
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void
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am_hal_flash_recovery(uint32_t ui32RecoveryKey)
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{
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g_am_hal_flash.flash_recovery(ui32RecoveryKey);
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}
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//*****************************************************************************
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//
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//! @brief Return ui32 value obtained from anywhere in D Code or System Bus
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//!
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//! @param ui32Address - return the value corresponding to this location.
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//!
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//! Use this function to read a value from various peripheral locations
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//! that must be read from code running external to flash.
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//!
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//! @return the value found
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//
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//*****************************************************************************
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uint32_t
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am_hal_flash_load_ui32(uint32_t ui32Address)
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{
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return g_am_hal_flash.flash_util_read_word((uint32_t*)ui32Address);
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}
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//*****************************************************************************
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//
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//! @brief Use the bootrom to write to a location in SRAM or the system bus.
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//!
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//! @param ui32Address - Store the data value corresponding to this location.
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//! @param ui32Data - 32-bit Data to be stored.
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//!
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//! Use this function to store a value to various peripheral or SRAM locations
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//! that can not be touched from code running in SRAM or FLASH. There is no
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//! known need for this function in Apollo2 at this time.
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//!
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//! @return None.
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//
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//*****************************************************************************
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void
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am_hal_flash_store_ui32(uint32_t ui32Address, uint32_t ui32Data)
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{
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g_am_hal_flash.flash_util_write_word((uint32_t*)ui32Address,
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ui32Data);
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}
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//*****************************************************************************
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//
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//! @brief Use the bootrom to implement a spin loop.
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//!
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//! @param ui32Iterations - Number of iterations to delay.
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//!
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//! Use this function to implement a CPU busy waiting spin loop without cache
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//! or delay uncertainties.
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//!
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//! Note that the ROM-based function executes at 3 cycles per iteration plus
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//! the regular function call, entry, and exit overhead.
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//! The call and return overhead, including the call to this function, is
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//! somewhere in the neighborhood of 14 cycles, or 4.7 iterations.
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//!
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//! Example:
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//! - MCU operating at 48MHz -> 20.83 ns / cycle
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//! - Therefore each iteration (once inside the bootrom function) will consume
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//! 62.5ns.
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//! - The total overhead (assuming 14 cycles) is 292ns.
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//! - For ui32Iterations=28: Total delay time = 0.292 + (0.0625 * 28) = 2.04us.
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//!
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//! The FLASH_CYCLES_US(n) macro can be used with am_hal_flash_delay() to
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//! get an approximate microsecond delay.
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//! e.g. For a 2us delay, use:
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//! am_hal_flash_delay( FLASH_CYCLES_US(2) );
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//!
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//! @note Interrupts are active during execution of this function. Therefore,
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//! any interrupt taken will affect the delay timing.
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//!
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//! @return None.
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//
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//*****************************************************************************
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void
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am_hal_flash_delay(uint32_t ui32Iterations)
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{
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g_am_hal_flash.delay_cycles(ui32Iterations);
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}
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//*****************************************************************************
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//
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//! @brief Static Helper Function to check customer info valid bits erasure.
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//!
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//! Use this function to test the state of the 128 valid bits at the beginning
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//! of customer info space. If these are all erased then return true.
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//!
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//! @return true if the customer info bits are currently erased.
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//
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//*****************************************************************************
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static bool
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customer_info_signature_erased(void)
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{
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uint32_t *pui32Signature = (uint32_t *) AM_HAL_FLASH_INFO_ADDR;
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return ( (pui32Signature[3] == 0xFFFFFFFF) &&
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(pui32Signature[2] == 0xFFFFFFFF) &&
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(pui32Signature[1] == 0xFFFFFFFF) &&
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(pui32Signature[0] == 0xFFFFFFFF) ) ? true : false;
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}
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|
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//*****************************************************************************
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//
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//! @brief Static Helper Function to set customer info valid bits
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//!
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//! Use this function to set the state of the 128 valid bits at the beginning
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//! of customer info space. If these bits are not set correctly then the
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//! customer protection bits in the INFO space will not be honored by the
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//! hardware.
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//!
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//! @return Zero for success. Non-Zero for errors.
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//
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//*****************************************************************************
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static int
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customer_info_signature_set(void)
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{
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uint32_t ui32Valid[4];
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int iRC;
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//
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// If they are already set then we are done.
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//
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if ( am_hal_flash_customer_info_signature_check() )
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{
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return 0;
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}
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|
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//
|
|
// If they are not erased at this point we have an error.
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//
|
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if ( !customer_info_signature_erased() )
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{
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return (2 << 16);
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}
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//
|
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// OK they need to be set so do it.
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//
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ui32Valid[3] = AM_HAL_FLASH_INFO_SIGNATURE3;
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ui32Valid[2] = AM_HAL_FLASH_INFO_SIGNATURE2;
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ui32Valid[1] = AM_HAL_FLASH_INFO_SIGNATURE1;
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ui32Valid[0] = AM_HAL_FLASH_INFO_SIGNATURE0;
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iRC = g_am_hal_flash.flash_program_info(AM_HAL_FLASH_PROGRAM_KEY,
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0, // instance
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ui32Valid, // source data
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0, // offset
|
|
4); // number of words
|
|
return iRC | ((iRC) ? (1 << 16) : 0);
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Check that the customer info bits are valid.
|
|
//!
|
|
//! Use this function to test the state of the 128 valid bits at the beginning
|
|
//! of customer info space. If these are not set correctly then the customer
|
|
//! protection bits in the INFO space will not be honored by the hardware.
|
|
//!
|
|
//! @return true if valid.
|
|
//
|
|
//*****************************************************************************
|
|
bool
|
|
am_hal_flash_customer_info_signature_check(void)
|
|
{
|
|
uint32_t *pui32Signature = (uint32_t *)AM_HAL_FLASH_INFO_ADDR;
|
|
|
|
return ( (pui32Signature[3] == AM_HAL_FLASH_INFO_SIGNATURE3) &&
|
|
(pui32Signature[2] == AM_HAL_FLASH_INFO_SIGNATURE2) &&
|
|
(pui32Signature[1] == AM_HAL_FLASH_INFO_SIGNATURE1) &&
|
|
(pui32Signature[0] == AM_HAL_FLASH_INFO_SIGNATURE0) );
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief INFO signature set.
|
|
//!
|
|
//! Use this function to set the state of the 128 valid bits at the beginning
|
|
//! of customer info space, if needed.
|
|
//!
|
|
//! @note Interrupts are active during execution of this function. Any interrupt
|
|
//! taken could cause execution errors. Please see the IMPORTANT note under
|
|
//! Detailed Description above for more details.
|
|
//!
|
|
//! @return Zero for success. Non-Zero for errors.
|
|
//
|
|
//*****************************************************************************
|
|
bool
|
|
am_hal_flash_info_signature_set(void)
|
|
{
|
|
//
|
|
// Check and set signature.
|
|
//
|
|
return customer_info_signature_set() ? false : true;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Disable FLASH INFO space.
|
|
//!
|
|
//! Use this function to set the state of the 128 valid bits at the beginning
|
|
//! of customer info space, if needed. Then disable FLASH erasure.
|
|
//!
|
|
//! @note Interrupts are active during execution of this function. Any interrupt
|
|
//! taken could cause execution errors. Please see the IMPORTANT note under
|
|
//! Detailed Description above for more details.
|
|
//!
|
|
//! @return Zero for success. Non-Zero for errors.
|
|
//
|
|
//*****************************************************************************
|
|
int32_t
|
|
am_hal_flash_info_erase_disable(void)
|
|
{
|
|
int iRC;
|
|
uint32_t ui32SecurityValue;
|
|
|
|
//
|
|
// Security protection only works if the signature data is correct.
|
|
//
|
|
iRC = customer_info_signature_set();
|
|
if ( iRC )
|
|
{
|
|
return iRC;
|
|
}
|
|
|
|
//
|
|
// Clear bit in INFO space to disable erasure.
|
|
//
|
|
ui32SecurityValue = AM_REGVAL(AM_HAL_FLASH_INFO_SECURITY_ADDR) &
|
|
~AM_HAL_FLASH_INFO_SECURITY_ENINFOERASE_M;
|
|
|
|
//
|
|
// Now write the word to the flash INFO space.
|
|
//
|
|
return g_am_hal_flash.flash_program_info(
|
|
AM_HAL_FLASH_PROGRAM_KEY,
|
|
0, // instance
|
|
&ui32SecurityValue, // source data
|
|
AM_HAL_FLASH_INFO_SECURITY_O / 4, // word offset
|
|
1 ); // number of words
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Check for Disabled FLASH INFO space.
|
|
//!
|
|
//! Use this function to determine whether FLASH INFO erasure is disabled.
|
|
//!
|
|
//! @return true if FLASH INFO erase is disabled, otherwise false.
|
|
//
|
|
//*****************************************************************************
|
|
bool
|
|
am_hal_flash_info_erase_disable_check(void)
|
|
{
|
|
//
|
|
// If they are erased at this point then SRAM wipe can't be enabled.
|
|
//
|
|
if ( customer_info_signature_erased() )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// If they are not valid at this point then SRAM wipe can't be enabled.
|
|
//
|
|
if ( !am_hal_flash_customer_info_signature_check() )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// Looking good so far, now check the SRAM WIPE bit.
|
|
//
|
|
return AM_REGVAL(AM_HAL_FLASH_INFO_SECURITY_ADDR) &
|
|
AM_HAL_FLASH_INFO_SECURITY_ENINFOERASE_M ? false : true;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Mask off 1 to 4 quadrants of FLASH INFO space for programming.
|
|
//!
|
|
//! Use this function to set the state of the 128 valid bits at the beginning
|
|
//! of customer info space, if needed. Then and the mask bits with the INFO
|
|
//! space programming disable bits.
|
|
//!
|
|
//! @param ui32Mask - A mask of the 4 quadrants of info space where
|
|
//! bit0 = First quadrant (first 2KB).
|
|
//! bit1 = Second quadrant (second 2KB).
|
|
//! bit2 = Third quadrant (third 2KB).
|
|
//! bit3 = Fourth quadrant (fourth 2KB).
|
|
//!
|
|
//! @note This function disables only, any quadrant already disabled is not
|
|
//! reenabled. That is, any ui32Mask bits specified as 0 are essentially nops.
|
|
//!
|
|
//! @note Interrupts are active during execution of this function. Any interrupt
|
|
//! taken could cause execution errors. Please see the IMPORTANT note under
|
|
//! Detailed Description above for more details.
|
|
//!
|
|
//! @return Zero for success. Non-Zero for errors.
|
|
//
|
|
//*****************************************************************************
|
|
int32_t
|
|
am_hal_flash_info_program_disable(uint32_t ui32Mask)
|
|
{
|
|
int iRC;
|
|
uint32_t ui32SecurityValue;
|
|
|
|
//
|
|
// Security protection only works if the signature data is correct.
|
|
//
|
|
iRC = customer_info_signature_set();
|
|
if ( iRC )
|
|
{
|
|
return iRC;
|
|
}
|
|
|
|
//
|
|
// Make sure we have a valid mask and get the mask into the correct position.
|
|
//
|
|
ui32Mask <<= AM_HAL_FLASH_INFO_SECURITY_ENINFOPRGM_S;
|
|
ui32Mask &= AM_HAL_FLASH_INFO_SECURITY_ENINFOPRGM_M;
|
|
|
|
//
|
|
// The security bit set to 1 enables programming, 0 disables programming.
|
|
//
|
|
ui32SecurityValue = AM_REGVAL(AM_HAL_FLASH_INFO_SECURITY_ADDR) & ~ui32Mask;
|
|
|
|
//
|
|
// Now write the word to the flash INFO space.
|
|
//
|
|
return g_am_hal_flash.flash_program_info(
|
|
AM_HAL_FLASH_PROGRAM_KEY,
|
|
0, // instance
|
|
&ui32SecurityValue, // source data
|
|
AM_HAL_FLASH_INFO_SECURITY_O / 4, // word offset
|
|
1 ); // number of words
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Return a mask specifying which quadrants of customer INFO space have
|
|
//! been disabled for programming.
|
|
//!
|
|
//! Use this function to determine whether programming of customer INFO space
|
|
//! has been disabled.
|
|
//!
|
|
//! @return A 4-bit mask of the disabled quadrants.
|
|
//! 0xFFFFFFFF indicates an error.
|
|
//! 0x0 indicates all customer INFO space programming is enabled.
|
|
//! 0xF indicates all customer INFO space programming is disabled.
|
|
//! bit0 indicates the first customer INFO space is disabled for programming.
|
|
//! bit1 indicates the second customer INFO space is disabled for programming.
|
|
//! bit2 indicates the third customer INFO space is disabled for programming.
|
|
//! bit3 indicates the fourth customer INFO space is disabled for programming.
|
|
//
|
|
//*****************************************************************************
|
|
uint32_t
|
|
am_hal_flash_info_program_disable_get(void)
|
|
{
|
|
//
|
|
// If they are erased at this point then SRAM wipe can't be enabled.
|
|
//
|
|
if ( customer_info_signature_erased() )
|
|
{
|
|
return 0xFFFFFFFF;
|
|
}
|
|
|
|
//
|
|
// If not valid at this point, then INFO programming can't be enabled.
|
|
//
|
|
if ( !am_hal_flash_customer_info_signature_check() )
|
|
{
|
|
return 0xFFFFFFFF;
|
|
}
|
|
|
|
//
|
|
// Looking good so far, now return a mask of the disabled bits.
|
|
//
|
|
return ((AM_REGVAL(AM_HAL_FLASH_INFO_SECURITY_ADDR) &
|
|
AM_HAL_FLASH_INFO_SECURITY_ENINFOPRGM_M) ^
|
|
AM_HAL_FLASH_INFO_SECURITY_ENINFOPRGM_M) >>
|
|
AM_HAL_FLASH_INFO_SECURITY_ENINFOPRGM_S;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Enable FLASH debugger protection (FLASH gets wiped if a debugger is
|
|
//! connected).
|
|
//!
|
|
//! Use this function to set the state of the 128 valid bits at the beginning
|
|
//! of customer info space, if needed. Then set the FLASH wipe bit to zero.
|
|
//!
|
|
//! @note Interrupts are active during execution of this function. Any interrupt
|
|
//! taken could cause execution errors. Please see the IMPORTANT note under
|
|
//! Detailed Description above for more details.
|
|
//!
|
|
//! @return Zero for success. Non-Zero for errors.
|
|
//
|
|
//*****************************************************************************
|
|
int32_t
|
|
am_hal_flash_wipe_flash_enable(void)
|
|
{
|
|
int iRC;
|
|
uint32_t ui32SecurityValue;
|
|
|
|
//
|
|
// Security protection only works if the signature data is correct.
|
|
//
|
|
iRC = customer_info_signature_set();
|
|
if ( iRC )
|
|
{
|
|
return iRC;
|
|
}
|
|
|
|
//
|
|
// Clear the FLASH Wipe bit.
|
|
//
|
|
ui32SecurityValue = AM_REGVAL(AM_HAL_FLASH_INFO_SECURITY_ADDR) &
|
|
~AM_HAL_FLASH_INFO_SECURITY_FLASHWIPE_M;
|
|
|
|
//
|
|
// Now write the word to the flash INFO space.
|
|
//
|
|
return g_am_hal_flash.flash_program_info(
|
|
AM_HAL_FLASH_PROGRAM_KEY,
|
|
0, // instance
|
|
&ui32SecurityValue, // source data
|
|
AM_HAL_FLASH_INFO_SECURITY_O / 4, // word offset
|
|
1 ); // number of words
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief check for FLASH wipe protection enabled.
|
|
//!
|
|
//! Use this function to determine if FLASH wipe protection is enabled.
|
|
//!
|
|
//! @return true if FLASH wipe protection is enabled, otherwise false.
|
|
//
|
|
//*****************************************************************************
|
|
bool
|
|
am_hal_flash_wipe_flash_enable_check(void)
|
|
{
|
|
//
|
|
// If they are erased at this point then flash wipe can't be enabled.
|
|
//
|
|
if ( customer_info_signature_erased() )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// If they are not valid at this point then flash wipe can't be enabled.
|
|
//
|
|
if ( !am_hal_flash_customer_info_signature_check() )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// Looking good so far, now check the Flash WIPE bit.
|
|
//
|
|
return AM_REGVAL(AM_HAL_FLASH_INFO_SECURITY_ADDR) &
|
|
AM_HAL_FLASH_INFO_SECURITY_FLASHWIPE_M ? false : true;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Enable SRAM protection so SRAM gets wiped if a debgger is connected.
|
|
//!
|
|
//! Use this function to set the state of the 128 valid bits at the beginning
|
|
//! of customer info space, if needed. Then set the SRAM wipe bit to zero.
|
|
//!
|
|
//! @note Interrupts are active during execution of this function. Any interrupt
|
|
//! taken could cause execution errors. Please see the IMPORTANT note under
|
|
//! Detailed Description above for more details.
|
|
//!
|
|
//! @return Zero for success. Non-Zero for errors.
|
|
//
|
|
//*****************************************************************************
|
|
int32_t
|
|
am_hal_flash_wipe_sram_enable(void)
|
|
{
|
|
int iRC;
|
|
uint32_t ui32SecurityValue;
|
|
|
|
//
|
|
// Security protection only works if the signature data is correct.
|
|
//
|
|
iRC = customer_info_signature_set();
|
|
if ( iRC )
|
|
{
|
|
return iRC;
|
|
}
|
|
|
|
//
|
|
// Clear the SRAM Wipe bit.
|
|
//
|
|
ui32SecurityValue = AM_REGVAL(AM_HAL_FLASH_INFO_SECURITY_ADDR) &
|
|
~AM_HAL_FLASH_INFO_SECURITY_SRAMWIPE_M;
|
|
|
|
//
|
|
// Now write the word to the flash INFO space.
|
|
//
|
|
return g_am_hal_flash.flash_program_info(
|
|
AM_HAL_FLASH_PROGRAM_KEY,
|
|
0, // instance
|
|
&ui32SecurityValue, // source data
|
|
AM_HAL_FLASH_INFO_SECURITY_O / 4, // word offset
|
|
1 ); // number of words
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief check for SRAM protection enabled.
|
|
//!
|
|
//! Use this function to determine if SRAM protection is enabled.
|
|
//!
|
|
//! @return true if SRAM wipe protection is enabled, otherwise false.
|
|
//
|
|
//*****************************************************************************
|
|
bool
|
|
am_hal_flash_wipe_sram_enable_check(void)
|
|
{
|
|
//
|
|
// If they are erased at this point then SRAM wipe can't be enabled.
|
|
//
|
|
if ( customer_info_signature_erased() )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// If they are not vale at this point then SRAM wipe can't be enabled.
|
|
//
|
|
if ( !am_hal_flash_customer_info_signature_check() )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// Looking good so far, now check the SRAM WIPE bit.
|
|
//
|
|
return AM_REGVAL(AM_HAL_FLASH_INFO_SECURITY_ADDR) &
|
|
AM_HAL_FLASH_INFO_SECURITY_SRAMWIPE_M ? false : true;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Disable Output from ITM/SWO.
|
|
//!
|
|
//! Use this function to set the state of the 128 valid bits at the beginning
|
|
//! of customer info space, if needed. Set the SWO disable bit to zero.
|
|
//!
|
|
//! @note Interrupts are active during execution of this function. Any interrupt
|
|
//! taken could cause execution errors. Please see the IMPORTANT note under
|
|
//! Detailed Description above for more details.
|
|
//!
|
|
//! @return Zero for success. Non-Zero for errors.
|
|
//
|
|
//*****************************************************************************
|
|
int32_t
|
|
am_hal_flash_swo_disable(void)
|
|
{
|
|
int iRC;
|
|
uint32_t ui32SecurityValue;
|
|
|
|
//
|
|
// Security protection only works if the signature data is correct.
|
|
//
|
|
iRC = customer_info_signature_set();
|
|
if ( iRC )
|
|
{
|
|
return iRC;
|
|
}
|
|
|
|
//
|
|
// Clear the SWO bit.
|
|
//
|
|
ui32SecurityValue = AM_REGVAL(AM_HAL_FLASH_INFO_SECURITY_ADDR) &
|
|
~AM_HAL_FLASH_INFO_SECURITY_SWOCTRL_M;
|
|
|
|
//
|
|
// Now write the word to the flash INFO space.
|
|
//
|
|
return g_am_hal_flash.flash_program_info(
|
|
AM_HAL_FLASH_PROGRAM_KEY,
|
|
0, // instance
|
|
&ui32SecurityValue, // source data
|
|
AM_HAL_FLASH_INFO_SECURITY_O / 4, // word offset
|
|
1 ); // number of words
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief check for SWO disabled.
|
|
//!
|
|
//! Use this function to determine if the SWO is disabled.
|
|
//!
|
|
//! @return true if the ITM/SWO is disabled, otherwise false.
|
|
//
|
|
//*****************************************************************************
|
|
bool
|
|
am_hal_flash_swo_disable_check(void)
|
|
{
|
|
//
|
|
// If they are erased at this point then SRAM wipe can't be enabled.
|
|
//
|
|
if ( customer_info_signature_erased() )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// If they are not vale at this point then SRAM wipe can't be enabled.
|
|
//
|
|
if ( !am_hal_flash_customer_info_signature_check() )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// Looking good so far, now check the SWO bit.
|
|
//
|
|
return AM_REGVAL(AM_HAL_FLASH_INFO_SECURITY_ADDR) &
|
|
AM_HAL_FLASH_INFO_SECURITY_SWOCTRL_M ? false : true;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief Disable Connections from a debugger on the SWD interface.
|
|
//!
|
|
//! Use this function to set the state of the 128 valid bits at the beginning
|
|
//! of customer info space, if needed. Set the debugger disable bit to zero.
|
|
//!
|
|
//! @note Interrupts are active during execution of this function. Any interrupt
|
|
//! taken could cause execution errors. Please see the IMPORTANT note under
|
|
//! Detailed Description above for more details.
|
|
//!
|
|
//! @return Zero for success. Non-Zero for errors.
|
|
//
|
|
//*****************************************************************************
|
|
int32_t
|
|
am_hal_flash_debugger_disable(void)
|
|
{
|
|
int iRC;
|
|
uint32_t ui32SecurityValue;
|
|
|
|
//
|
|
// Security protection only works if the signature data is correct.
|
|
//
|
|
iRC = customer_info_signature_set();
|
|
if ( iRC )
|
|
{
|
|
return iRC;
|
|
}
|
|
|
|
//
|
|
// Clear the DEBUGGER bit.
|
|
//
|
|
ui32SecurityValue = AM_REGVAL(AM_HAL_FLASH_INFO_SECURITY_ADDR) &
|
|
~AM_HAL_FLASH_INFO_SECURITY_DEBUGGERPROT_M;
|
|
|
|
//
|
|
// Now write the word to the flash INFO space.
|
|
//
|
|
return g_am_hal_flash.flash_program_info(
|
|
AM_HAL_FLASH_PROGRAM_KEY,
|
|
0, // instance
|
|
&ui32SecurityValue, // source data
|
|
AM_HAL_FLASH_INFO_SECURITY_O / 4, // word offset
|
|
1 ); // number of words
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief check for debugger disabled.
|
|
//!
|
|
//! Use this function to determine if the debugger is disabled.
|
|
//!
|
|
//! @return true if the debugger is disabled, otherwise false.
|
|
//
|
|
//*****************************************************************************
|
|
bool
|
|
am_hal_flash_debugger_disable_check(void)
|
|
{
|
|
//
|
|
// If they are erased at this point then SRAM wipe can't be enabled.
|
|
//
|
|
if ( customer_info_signature_erased() )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// If they are not vale at this point then SRAM wipe can't be enabled.
|
|
//
|
|
if ( !am_hal_flash_customer_info_signature_check() )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// Looking good so far, now check the debugger disable bit.
|
|
//
|
|
return AM_REGVAL(AM_HAL_FLASH_INFO_SECURITY_ADDR) &
|
|
AM_HAL_FLASH_INFO_SECURITY_DEBUGGERPROT_M ? false : true;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief This static helper function generates a 64-bit protection mask.
|
|
//!
|
|
//! @param pui32StartAddress - Starting address in flash to begin protection.
|
|
//! @param pui32StopAddress - Ending address in flash to stop protection.
|
|
//!
|
|
//! This function computes a chunk map for the protection range.
|
|
//!
|
|
//! @return Inverse of the actual chunk mask. That is, chunks to be protected
|
|
//! are represented as 0 in the returned mask, while chunks to be left alone
|
|
//! are represented as 1. This value can therefore be directly ANDed with the
|
|
//! existing bits in INFO space.
|
|
//! Note that -1 is returned if input parameters are invalid - this return
|
|
//! value would indicate that no chunks are to be protected.
|
|
//!
|
|
//
|
|
//*****************************************************************************
|
|
static uint64_t
|
|
generate_chunk_mask(uint32_t *pui32StartAddress, uint32_t *pui32StopAddress)
|
|
{
|
|
uint32_t ui32ChunkStart, ui32ChunkStop;
|
|
uint32_t ui32Width;
|
|
uint64_t ui64Mask;
|
|
|
|
//
|
|
// Validate the address input parameters
|
|
//
|
|
if ( (pui32StartAddress > pui32StopAddress) ||
|
|
(pui32StopAddress > (uint32_t*)AM_HAL_FLASH_LARGEST_VALID_ADDR) )
|
|
{
|
|
//
|
|
// Argument error, return value to leave all chunks unprotected.
|
|
//
|
|
return 0xFFFFFFFFFFFFFFFF;
|
|
}
|
|
|
|
//
|
|
// Extract chunk related information
|
|
//
|
|
ui32ChunkStart = AM_HAL_FLASH_INFO_ADDR2CHUNK((uint32_t)pui32StartAddress);
|
|
ui32ChunkStop = AM_HAL_FLASH_INFO_ADDR2CHUNK((uint32_t)pui32StopAddress);
|
|
ui32Width = ui32ChunkStop - ui32ChunkStart + 1;
|
|
|
|
if ( ui32Width == 64 )
|
|
{
|
|
ui64Mask = (uint64_t)0xFFFFFFFFFFFFFFFFLLU;
|
|
}
|
|
else
|
|
{
|
|
ui64Mask = ( ((uint64_t)0x0000000000000001) << ui32Width) - 1;
|
|
ui64Mask <<= ui32ChunkStart;
|
|
}
|
|
|
|
//
|
|
// OK now return the chunk mask (inverted).
|
|
//
|
|
return ~ui64Mask;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief This function sets copy protection for a range of flash chunks.
|
|
//!
|
|
//! @param pui32StartAddress - Starting address in flash to begin protection.
|
|
//! @param pui32StopAddress - Ending address in flash to stop protection.
|
|
//!
|
|
//! This function will set copy protection bits for a range of flash chunks
|
|
//!
|
|
//! @note Each flash chunk contains 16KBytes and corresponds to one bit in
|
|
//! the protection register. Set the bit to zero to enable protection.
|
|
//!
|
|
//! @note Interrupts are active during execution of this function. Any interrupt
|
|
//! taken could cause execution errors. Please see the IMPORTANT note under
|
|
//! Detailed Description above for more details.
|
|
//!
|
|
//! @return
|
|
//! 0 for success.
|
|
//! 0x400000 if the protection bits were already programmed (mask the return
|
|
//! value with 0x3FFFFF to ignore this case and treat as success).
|
|
//! Otherwise, non-zero for failure.
|
|
//
|
|
//*****************************************************************************
|
|
int32_t
|
|
am_hal_flash_copy_protect_set(uint32_t *pui32StartAddress,
|
|
uint32_t *pui32StopAddress)
|
|
{
|
|
int iRC;
|
|
bool bModified = false;
|
|
uint64_t ui64Mask;
|
|
uint32_t ui32Work;
|
|
uint32_t ui32Protection[2];
|
|
uint32_t *pui32Protection = (uint32_t *)AM_HAL_FLASH_INFO_COPYPROT_ADDR;
|
|
|
|
//
|
|
// Extract chunk mask from parameters.
|
|
// Also checks parameter validity (returns -1 if bad parameters).
|
|
//
|
|
ui64Mask = generate_chunk_mask(pui32StartAddress, pui32StopAddress);
|
|
if ( ~ui64Mask == 0x0 )
|
|
{
|
|
return 0x100000;
|
|
}
|
|
|
|
//
|
|
// Go get the current settings for copy protection.
|
|
//
|
|
ui32Protection[0] = pui32Protection[0];
|
|
ui32Protection[1] = pui32Protection[1];
|
|
|
|
//
|
|
// AND mask off the necessary protection bits in the lower word.
|
|
//
|
|
ui32Work = (uint32_t)ui64Mask;
|
|
if ( ( ~ui32Work ) && ( ui32Work != ui32Protection[0] ) )
|
|
{
|
|
bModified = true;
|
|
ui32Protection[0] &= ui32Work;
|
|
iRC = g_am_hal_flash.flash_program_info(
|
|
AM_HAL_FLASH_PROGRAM_KEY,
|
|
0, // instance
|
|
&ui32Protection[0], // source data
|
|
(AM_HAL_FLASH_INFO_COPYPROT_O / 4) + 0, // word offset
|
|
1 ); // number of words
|
|
|
|
if ( iRC )
|
|
{
|
|
return iRC | 0x10000;
|
|
}
|
|
}
|
|
|
|
//
|
|
// AND mask off the necessary protection bits in the upper word.
|
|
//
|
|
ui32Work = (uint32_t)(ui64Mask >> 32);
|
|
if ( ( ~ui32Work ) && ( ui32Work != ui32Protection[1] ) )
|
|
{
|
|
bModified = true;
|
|
ui32Protection[1] &= ui32Work;
|
|
iRC = g_am_hal_flash.flash_program_info(
|
|
AM_HAL_FLASH_PROGRAM_KEY,
|
|
0, // instance
|
|
&ui32Protection[1], // source data
|
|
(AM_HAL_FLASH_INFO_COPYPROT_O / 4) + 1, // word offset
|
|
1 ); // number of words
|
|
|
|
if ( iRC )
|
|
{
|
|
return iRC | 0x20000;
|
|
}
|
|
}
|
|
|
|
if ( bModified )
|
|
{
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
return 0x400000;
|
|
}
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief This function checks copy protection for a range of flash chunks.
|
|
//!
|
|
//! @param pui32StartAddress - Starting address in flash.
|
|
//! @param pui32StopAddress - Ending address in flash.
|
|
//!
|
|
//! This function will check copy protection bits for a range of flash chunks
|
|
//! it expects all chunks in the range to be protected.
|
|
//!
|
|
//! @note Each flash chunk contains 16KBytes and corresponds to one bit in
|
|
//! the protection register. Set the bit to zero to enable protection.
|
|
//!
|
|
//! @return false for at least one chunk in the covered range is not protected,
|
|
//! and true if all chunks in the covered range are protected.
|
|
//!
|
|
//
|
|
//*****************************************************************************
|
|
bool
|
|
am_hal_flash_copy_protect_check(uint32_t *pui32StartAddress,
|
|
uint32_t *pui32StopAddress)
|
|
{
|
|
uint64_t ui64Mask;
|
|
uint32_t ui32Work;
|
|
uint32_t *pui32Protection = (uint32_t *)AM_HAL_FLASH_INFO_COPYPROT_ADDR;
|
|
|
|
//
|
|
// Extract chunk mask from parameters.
|
|
// Also checks parameter validity (returns -1 if bad parameters).
|
|
//
|
|
ui64Mask = generate_chunk_mask(pui32StartAddress, pui32StopAddress);
|
|
if ( ~ui64Mask == 0x0 )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// Now check the lower word of protection bits.
|
|
//
|
|
ui32Work = (uint32_t)ui64Mask;
|
|
if ( ~ui32Work & pui32Protection[0] )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// Now check the lower word of protection bits.
|
|
//
|
|
ui32Work = (uint32_t)(ui64Mask >> 32);
|
|
if ( ~ui32Work & pui32Protection[1] )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// If we get here, there are no unprotected chunks within specified range.
|
|
//
|
|
return true;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief This function sets write protection for a range of flash chunks.
|
|
//!
|
|
//! @param pui32StartAddress - Starting address in flash to begin protection.
|
|
//! @param pui32StopAddress - Ending address in flash to stop protection.
|
|
//!
|
|
//! This function will set write protection bits for a range of flash chunks
|
|
//!
|
|
//! @note Each flash chunk contains 16KBytes and corresponds to one bit in
|
|
//! the protection register. Set the bit to zero to enable protection.
|
|
//!
|
|
//! @note Interrupts are active during execution of this function. Any interrupt
|
|
//! taken could cause execution errors. Please see the IMPORTANT note under
|
|
//! Detailed Description above for more details.
|
|
//!
|
|
//! @return
|
|
//! 0 for success.
|
|
//! 0x400000 if the protection bits were already programmed (mask the return
|
|
//! value with 0x3FFFFF to ignore this case and treat as success).
|
|
//! Otherwise, non-zero for failure.
|
|
//
|
|
//*****************************************************************************
|
|
int32_t
|
|
am_hal_flash_write_protect_set(uint32_t *pui32StartAddress,
|
|
uint32_t *pui32StopAddress)
|
|
{
|
|
int iRC;
|
|
bool bModified = false;
|
|
uint64_t ui64Mask;
|
|
uint32_t ui32Work;
|
|
uint32_t ui32Protection[2];
|
|
uint32_t *pui32Protection = (uint32_t *)AM_HAL_FLASH_INFO_WRITPROT_ADDR;
|
|
|
|
//
|
|
// Extract chunk mask from parameters.
|
|
// Also checks parameter validity (returns -1 if bad parameters).
|
|
//
|
|
ui64Mask = generate_chunk_mask(pui32StartAddress, pui32StopAddress);
|
|
if ( ~ui64Mask == 0x0 )
|
|
{
|
|
return 0x100000;
|
|
}
|
|
|
|
//
|
|
// Go get the current settings for copy protection.
|
|
//
|
|
ui32Protection[0] = pui32Protection[0];
|
|
ui32Protection[1] = pui32Protection[1];
|
|
|
|
//
|
|
// AND mask off the necessary protection bits in the lower word.
|
|
//
|
|
ui32Work = (uint32_t)ui64Mask;
|
|
if ( ( ~ui32Work ) && ( ui32Work != ui32Protection[0] ) )
|
|
{
|
|
bModified = true;
|
|
ui32Protection[0] &= ui32Work;
|
|
iRC = g_am_hal_flash.flash_program_info(
|
|
AM_HAL_FLASH_PROGRAM_KEY,
|
|
0, // instance
|
|
&ui32Protection[0], // source data
|
|
(AM_HAL_FLASH_INFO_WRITPROT_O / 4) + 0, // word offset
|
|
1 ); // number of words
|
|
|
|
if ( iRC )
|
|
{
|
|
return iRC | 0x10000;
|
|
}
|
|
}
|
|
|
|
//
|
|
// AND mask off the necessary protection bits in the upper word.
|
|
//
|
|
ui32Work = (uint32_t)(ui64Mask >> 32);
|
|
if ( ( ~ui32Work ) && ( ui32Work != ui32Protection[1] ) )
|
|
{
|
|
bModified = true;
|
|
ui32Protection[1] &= ui32Work;
|
|
iRC = g_am_hal_flash.flash_program_info(
|
|
AM_HAL_FLASH_PROGRAM_KEY,
|
|
0, // instance
|
|
&ui32Protection[1], // source data
|
|
(AM_HAL_FLASH_INFO_WRITPROT_O / 4) + 1, // word offset
|
|
1 ); // number of words
|
|
|
|
if ( iRC )
|
|
{
|
|
return iRC | 0x20000;
|
|
}
|
|
}
|
|
|
|
if ( bModified )
|
|
{
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
return 0x400000;
|
|
}
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
//! @brief This function checks write protection for a range of flash chunks.
|
|
//!
|
|
//! @param pui32StartAddress - Starting address in flash.
|
|
//! @param pui32StopAddress - Ending address in flash.
|
|
//!
|
|
//! This function will check write protection bits for a range of flash chunks
|
|
//! it expects all chunks in the range to be protected.
|
|
//!
|
|
//! @note Each flash chunk contains 16KBytes and corresponds to one bit in
|
|
//! the protection register. Set the bit to zero to enable protection.
|
|
//!
|
|
//! @return false for at least one chunk in the covered range is not protected,
|
|
//! and true if all chunks in the covered range are protected.
|
|
//!
|
|
//
|
|
//*****************************************************************************
|
|
bool
|
|
am_hal_flash_write_protect_check(uint32_t *pui32StartAddress,
|
|
uint32_t *pui32StopAddress)
|
|
{
|
|
uint64_t ui64Mask;
|
|
uint32_t ui32Work;
|
|
uint32_t *pui32Protection = (uint32_t *)AM_HAL_FLASH_INFO_WRITPROT_ADDR;
|
|
|
|
//
|
|
// Extract chunk mask from parameters.
|
|
// Also checks parameter validity (returns -1 if bad parameters).
|
|
//
|
|
ui64Mask = generate_chunk_mask(pui32StartAddress, pui32StopAddress);
|
|
if ( ~ui64Mask == 0x0 )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// Now check the lower word of protection bits.
|
|
//
|
|
ui32Work = (uint32_t)ui64Mask;
|
|
if ( ~ui32Work & pui32Protection[0] )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// Now check the lower word of protection bits.
|
|
//
|
|
ui32Work = (uint32_t)(ui64Mask >> 32);
|
|
if ( ~ui32Work & pui32Protection[1] )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// If we get here, there are no unprotected chunks within specified range.
|
|
//
|
|
return true;
|
|
}
|
|
|
|
//*****************************************************************************
|
|
//
|
|
// End Doxygen group.
|
|
//! @}
|
|
//
|
|
//*****************************************************************************
|