124 lines
2.3 KiB
C
124 lines
2.3 KiB
C
/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-05-06 Jesven first version
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include <mmu.h>
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#include <mm_aspace.h>
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#include <ioremap.h>
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void *rt_ioremap_start;
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size_t rt_ioremap_size;
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#ifdef RT_USING_SMART
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#include <lwp_mm.h>
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#define DBG_TAG "mm.ioremap"
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#define DBG_LVL DBG_LOG
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#include <rtdbg.h>
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enum ioremap_type
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{
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MM_AREA_TYPE_PHY,
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MM_AREA_TYPE_PHY_WT,
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MM_AREA_TYPE_PHY_CACHED
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};
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static void *_ioremap_type(void *paddr, size_t size, enum ioremap_type type)
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{
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char *v_addr = NULL;
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size_t attr;
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size_t lo_off;
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int err;
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lo_off = (rt_ubase_t)paddr & ARCH_PAGE_MASK;
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struct rt_mm_va_hint hint = {
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.prefer = RT_NULL,
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.map_size = RT_ALIGN(size + lo_off, ARCH_PAGE_SIZE),
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.flags = 0,
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.limit_start = rt_ioremap_start,
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.limit_range_size = rt_ioremap_size,
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};
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switch (type)
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{
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case MM_AREA_TYPE_PHY:
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attr = MMU_MAP_K_DEVICE;
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break;
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case MM_AREA_TYPE_PHY_WT:
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attr = MMU_MAP_K_RW;
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break;
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case MM_AREA_TYPE_PHY_CACHED:
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attr = MMU_MAP_K_RWCB;
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break;
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default:
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return v_addr;
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}
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err = rt_aspace_map_phy(&rt_kernel_space, &hint, attr, MM_PA_TO_OFF(paddr), (void **)&v_addr);
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if (err)
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{
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LOG_W("IOREMAP 0x%lx failed %d\n", paddr, err);
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v_addr = NULL;
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}
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else
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{
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v_addr = v_addr + lo_off;
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}
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return v_addr;
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}
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void *rt_ioremap(void *paddr, size_t size)
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{
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return _ioremap_type(paddr, size, MM_AREA_TYPE_PHY);
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}
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void *rt_ioremap_nocache(void *paddr, size_t size)
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{
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return _ioremap_type(paddr, size, MM_AREA_TYPE_PHY);
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}
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void *rt_ioremap_wt(void *paddr, size_t size)
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{
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return _ioremap_type(paddr, size, MM_AREA_TYPE_PHY_WT);
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}
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void *rt_ioremap_cached(void *paddr, size_t size)
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{
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return _ioremap_type(paddr, size, MM_AREA_TYPE_PHY_CACHED);
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}
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void rt_iounmap(volatile void *vaddr)
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{
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rt_aspace_unmap(&rt_kernel_space, (void *)vaddr);
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}
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#else
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void *rt_ioremap(void *paddr, size_t size)
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{
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return paddr;
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}
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void *rt_ioremap_nocache(void *paddr, size_t size)
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{
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return paddr;
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}
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void *rt_ioremap_cached(void *paddr, size_t size)
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{
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return paddr;
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}
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void rt_iounmap(volatile void *vaddr)
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{
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}
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#endif
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