esp-idf/components/esp32/include/rom/cache.h

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2016-08-17 11:08:22 -04:00
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef _ROM_CACHE_H_
#define _ROM_CACHE_H_
#ifdef __cplusplus
extern "C" {
#endif
//===========================================
// function : cache_init
// description: initialise cache mmu, mark all entries as invalid.
// conditions:
// Call Cache_Read_Disable() before calling this function.
// inputs:
// cpu_no is CPU number,0(PRO CPU) or 1(APP CPU),
// output: NONE
//===========================================
void mmu_init(int cpu_no);
//===========================================
// function : cache_flash_mmu_set
// description: Configure MMU to cache a flash region.
// conditions:
// Call this function to configure the flash cache before enabling it.
// Check return value to verify MMU was set correctly.
// inputs:
// cpu_no is CPU number,0(PRO CPU) or 1(APP CPU),
// pid is process identifier. Range 0~7
// vaddr is "virtual" address in CPU address space. Can be IRam0, IRam1, IRom0 and DRom0 memory address.
// Should be aligned by psize
// paddr is "physical" address in flash controller's address space.
// ie for 16M flash the range is 0x000000~0xFFFFFF. Should be aligned by psize
// psize is page size of flash, in kilobytes. Can be 64, 32, 16.
// num is number of pages to be set, valid range 0 ~ (flash size)/(page size)
// output: error status
// 0 : mmu set success
// 1 : vaddr or paddr is not aligned
// 2 : pid error
// 3 : psize error
// 4 : mmu table to be written is out of range
// 5 : vaddr is out of range
//===========================================
unsigned int cache_flash_mmu_set(int cpu_no, int pid, unsigned int vaddr, unsigned int paddr, int psize, int num);
unsigned int cache_sram_mmu_set(int cpu_no, int pid,unsigned int vaddr, unsigned int paddr, int psize, int num);
void Cache_Read_Init(int cpu_no);
void Cache_Read_Disable(int cpu_no);
void Cache_Read_Enable(int cpu_no);
#ifdef __cplusplus
}
#endif
#endif /* _ROM_CACHE_H_ */