1 //==========================================================================
5 // Flash programming - query device
7 //==========================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
10 // This file is part of eCos, the Embedded Configurable Operating System.
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38 // -------------------------------------------
39 //####ECOSGPLCOPYRIGHTEND####
40 //==========================================================================
41 //#####DESCRIPTIONBEGIN####
43 // Author(s): gthomas, hmt
44 // Contributors: gthomas
49 //####DESCRIPTIONEND####
51 //==========================================================================
55 #include <pkgconf/hal.h>
56 #include <cyg/hal/hal_arch.h>
57 #include CYGHWR_MEMORY_LAYOUT_H
59 // Platforms may define this for special handling when accessing the query data.
60 #ifndef CYGHWR_FLASH_READ_QUERY
61 #define CYGHWR_FLASH_READ_QUERY(a) (*(a))
64 #define CNT 20*1000*10 // Approx 20ms
67 flash_query(unsigned char *data) __attribute__ ((section (".2ram.flash_query")));
69 flash_query(unsigned char *data)
71 volatile flash_t *ROM, *p, dummy;
74 // Get base address and map addresses to virtual addresses
75 ROM = FLASH_P2V( CYGNUM_FLASH_BASE );
76 #ifdef CYGOPT_FLASH_IS_BOOTBLOCK
77 // BootBlock flash does not support full Read_Query - we have do a
78 // table oriented thing above, after getting just two bytes of results:
79 ROM[0] = FLASH_Read_ID;
82 // StrataFlash supports the full Read_Query op:
83 ROM[0] = FLASH_Read_Query;
84 i = sizeof(struct FLASH_query);
85 #endif // Not CYGOPT_FLASH_IS_BOOTBLOCK
87 for (cnt = CNT; cnt > 0; cnt--) ;
90 // It is very deliberate that data is chars NOT flash_t:
91 // The info comes out in bytes regardless of device.
92 *data++ = (unsigned char) CYGHWR_FLASH_READ_QUERY(p++);
93 #ifndef CYGOPT_FLASH_IS_BOOTBLOCK
94 # if 8 == CYGNUM_FLASH_WIDTH
95 // strata flash with 'byte-enable' contains the configuration data
101 // Reset the flash to array mode. The dummy read is required on MIPS
102 // platforms (don't know about others) to force the write out. Should
103 // there be direct HAL support for this kind of operation?
104 ROM[0] = FLASH_Reset;