TivaFlash.hxx

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#ifndef _FREERTOS_DRIVERS_TI_TIVAFLASH_HXX_
#define _FREERTOS_DRIVERS_TI_TIVAFLASH_HXX_
 
#include "Devtab.hxx"
 
class TivaFlash : public Node
{
public:
    TivaFlash(
        const char *name, const void *ptr, size_t length, uint32_t page_size)
        : Node(name)
        , base_(static_cast<const uint8_t *>(ptr))
        , len_(length)
        , pageSize_(page_size)
    {
        HASSERT(!(read_address() & (page_size - 1)));
    }
 
    ssize_t read(File *, void *, size_t) OVERRIDE;
    ssize_t write(File *, const void *, size_t) OVERRIDE;
 
    void enable() OVERRIDE {}
    void disable() OVERRIDE {}
    void flush_buffers() OVERRIDE {}
 
private:
    uint32_t subpage_mask() {
        return pageSize_ - 1;
    }
 
    uint32_t page_mask() {
        return ~subpage_mask();
    }
 
    uint32_t write_page_mask() {
        return ~(write_page_size()-1);
    }
 
    uint32_t write_page_size() {
        return 0x80;
    }
 
    const uint8_t* read_pointer() {
        return base_;
    }
 
    uint32_t read_address() {
        return reinterpret_cast<uint32_t>(base_);
    }
 
    const uint8_t *base_;
    size_t len_;
    size_t pageSize_;
};
 
#endif // _FREERTOS_DRIVERS_TI_TIVAFLASH_HXX_