/**
* \file
* <!--
- * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
+ * Copyright 2007 Develer S.r.l. (http://www.develer.com/)
* All Rights Reserved.
* -->
*
*
* \version $Id$
* \author Francesco Sacchi <batt@develer.com>
+ * \author Daniele Basile <asterix@develer.com>
*/
#include "prog.h"
+
+#include <string.h>
+
#include <drv/wdt.h>
#include <cfg/macros.h> // MIN()
#include <cfg/compiler.h>
-#include <flash.h>
-#include <defines.h>
-#include <avr/io.h>
-#include <algos/rotating_hash.h>
+#include <cfg/debug.h>
-#define PAGEBUF 512
+#include <avr/io.h>
+#include <avr/boot.h>
+#include <avr/pgmspace.h>
-typedef uint16_t page_addr_t;
-typedef uint16_t page_t;
+typedef uint16_t avr_page_addr_t;
+typedef uint16_t avr_page_t;
/**
- * Temporary buffer for cointain data block to
+ * Temporary buffer cointaing data block to
* write on flash.
*/
-static uint8_t page_buf[PAGEBUF];
+static uint8_t page_buf[SPM_PAGESIZE];
+
+bool page_modified; /// Flag for checking if current page is modified.
/**
- * Store current flash page memory in use.
+ * Current buffered page.
*/
-static page_t curr_pag_num = 0;
-
-
+static avr_page_t curr_page = 0;
/**
- * Erase Flash.
+ * Write current buffered page in flash memory (if modified).
+ * This function erase flash memory page before writing.
*/
-static void prog_erase_flash(void)
+static void prog_flush(void)
{
- uint32_t flash_addr;
+ if (page_modified)
+ {
+ kprintf("Flushing page %d\n", curr_page);
- /* Erase the flash ROM */
- #ifdef LARGE_MEMORY
- /*
- * SPM uses Z pointer but the pointer is only 16 bit and
- * can only address up to 64Kbytes FLASH. Higher locations
- * require the use of RAMPZ
- */
- RAMPZ = 0x00;
+ boot_spm_busy_wait(); // Wait while the SPM instruction is busy.
- for (flash_addr = 0; (flash_addr < (uint16_t)(APP_END & 0xFFFF)) | (RAMPZ == 0x00));
+ kprintf("Filling temparary page buffer...");
+ /* Fill the temporary buffer of the AVR */
+ for (avr_page_addr_t page_addr = 0; page_addr < SPM_PAGESIZE; page_addr += 2)
{
- wdt_reset();
-
- /* Page erase */
- write_page(flash_addr, BV(PGERS) + BV(SPMEN));
-
- /* Re-enable the RWW section */
- write_page(flash_addr, BV(REENABLE_RWW_BIT) + BV(SPMEN));
+ uint16_t word = ((uint16_t)page_buf[page_addr + 1] << 8) | page_buf[page_addr];
- /* Last section on lower 64k segment is erased */
- if(flashgg_addr >= (0xFFFF - PAGESIZE))
-
- /* RAMPZ has to be incremented into upper 64k segment */
- RAMPZ = BV(RAMPZ0);
+ ATOMIC(boot_page_fill(page_addr, word));
}
- RAMPZ = 0x00;
- #else /* LARGE_MEMORY */
- /* Application section = 60 pages */
- for (flash_addr = 0; flash_addr < APP_END; flash_addr += PAGESIZE)
- {
- wdt_reset();
+ kprintf("Done.\n");
- /* Page erase */
- write_page(flash_addr, BV(PGERS) + BV(SPMEN));
- /* Re-enable RWW section */
- write_page(flash_addr, BV(REENABLE_RWW_BIT) + BV(SPMEN));
- }
- #endif /* LARGE_MEMORY */
-}
+ wdt_reset();
+ kprintf("Erasing page, addr %d...", curr_page * SPM_PAGESIZE);
-/**
- * Write a page in program memory.
- */
-static void prog_pagewrite(uint16_t addr)
-{
- write_page(addr, BV(PGWRT) + BV(SPMEN));
+ /* Page erase */
+ ATOMIC(boot_page_erase(curr_page * SPM_PAGESIZE));
- /* Re-enable the RWW section */
- write_page(addr, BV(REENABLE_RWW_BIT) + BV(SPMEN));
-}
+ /* Wait until the memory is erased. */
+ boot_spm_busy_wait();
+ kprintf("Done.\n");
+ kprintf("Writing page, addr %d...", curr_page * SPM_PAGESIZE);
-/**
- * Delete a page in program memory.
- */
-static void prog_pagedelete(uint16_t addr)
-{
- /* Page erase */
- write_page(addr, BV(PGERS) + BV(SPMEN));
+ /* Store buffer in flash page. */
+ ATOMIC(boot_page_write(curr_page * SPM_PAGESIZE));
+ boot_spm_busy_wait(); // Wait while the SPM instruction is busy.
- /* Re-enable the RWW section */
- write_page(addr, BV(REENABLE_RWW_BIT) + BV(SPMEN));
+ /*
+ * Reenable RWW-section again. We need this if we want to jump back
+ * to the application after bootloading.
+ */
+ ATOMIC(boot_rww_enable());
+
+ page_modified = false;
+ kprintf("Done.\n");
+ }
}
+
/**
- * Flush temporary buffer into flash memory.
+ * Check current page and if \param page is different, load it in
+ * temporary buffer.
*/
-static void prog_flush(void)
+static void prog_loadPage(avr_page_t page)
{
-
- /* Fill the temporary buffer of the AVR */
- for (page_addr_t page_addr = 0; page_addr < PAGEBUF; page_addr += 2)
- fill_temp_buffer(page_buf[page_addr + 1] | (uint16_t)page_buf[page_addr] << 8, page_addr);
-
-
- wdt_reset();
-
- /* Page delete */
- prog_pagedelete(curr_page_num * PAGEBUF);
-
- /* Page write */
- prog_pagewrite(curr_page_num * PAGEBUF);
+ if (page != curr_page)
+ {
+ prog_flush();
+ // Load page
+ memcpy_P(page_buf, (const char *)(page * SPM_PAGESIZE), SPM_PAGESIZE);
+ curr_page = page;
+ kprintf("Loaded page %d\n", curr_page);
+ }
}
/**
* Write program memory.
- * This function to write on flash memory load a selected page from
- * flash memory and save it in temporary buffer. Them update temporary buffer
- * with \param buf data. We write in flash memory everery time we
- * change current page memory.
- *
+ * Write \param size bytes from buffer \param buf to file \param *fd
+ * \note Write operations are buffered.
*/
-size_t prog_write(struct _KFile *fd, const char *buf, size_t size)
+size_t prog_write(struct _KFile *fd, const void *_buf, size_t size)
{
+ const uint8_t *buf =(const uint8_t *)_buf;
- page_t page;
- page_addr_t page_addr;
+ avr_page_t page;
+ avr_page_addr_t page_addr;
size_t total_write = 0;
- size_t wr_len;
+ ASSERT(fd->seek_pos + size <= fd->size);
+ size = MIN((uint32_t)size, fd->size - fd->seek_pos);
+
+ kprintf("Writing at pos[%d]\n", fd->seek_pos);
while (size)
{
- /* Current page memory */
- page = fd->SeekPos / PAGEBUF;
-
- /* Address in page memory */
- page_addr = fd->SeekPos % PAGEBUF;
+ page = fd->seek_pos / SPM_PAGESIZE;
+ page_addr = fd->seek_pos % SPM_PAGESIZE;
prog_loadPage(page);
- wr_len = MIN(size, PAGEBUF - page_addr);
+ size_t wr_len = MIN(size, SPM_PAGESIZE - page_addr);
memcpy(page_buf + page_addr, buf, wr_len);
+ page_modified = true;
buf += wr_len;
- fd->SeekPos += wr_len;
+ fd->seek_pos += wr_len;
size -= wr_len;
total_write += wr_len;
}
- /* Return total byte write on flash memory */
+ kprintf("written %d bytes\n", total_write);
return total_write;
}
+/**
+ * Open flash file \param *fd.
+ * \param name and \param mode are unused, cause flash memory is
+ * threated like one file.
+ */
+bool prog_open(struct _KFile *fd, UNUSED_ARG(const char *, name), UNUSED_ARG(int, mode))
+{
+ curr_page = 0;
+ memcpy_P(page_buf, (const char *)(curr_page * SPM_PAGESIZE), SPM_PAGESIZE);
+ fd->seek_pos = 0;
+ fd->size = (uint16_t)(FLASHEND - CONFIG_BOOT_SIZE + 1);
+ page_modified = false;
+
+ kprintf("Flash file opened\n");
+ return true;
+}
/**
- * Load select \param page memory buffer from AVR flash memory.
- * If select page is not current page, we flush it, and then we load
- * select page memory flash.
+ * Close file \param *fd
*/
-void prog_loadPage(page_t page)
+bool prog_close(UNUSED_ARG(struct _KFile *,fd))
{
- if (page != curr_page_num)
- {
- prog_flush();
- /* Load selet page in temporary buffer store into RAM */
- memcpy_P(page_buf, (const char *)(page * PAGEBUF), PAGEBUF);
- /* Update current page */
- curr_page_num = page;
- }
+ prog_flush();
+ kprintf("Flash file closed\n");
+ return true;
}
+
+/**
+ * Move \param *fd file seek position of \param offset bytes
+ * from current position.
+ */
+bool prog_seek(struct _KFile *fd, int32_t offset)
+{
+ ASSERT(fd->seek_pos + offset <= fd->size);
+
+ /* Bound check */
+ if (fd->seek_pos + offset > fd->size)
+ return false;
+
+ fd->seek_pos += offset;
+ kprintf("Flash seek to [%d]\n", fd->seek_pos);
+
+ return true;
+}
+
+/**
+ * Read from file \param *fd \param size bytes and put it in buffer \param *buf
+ * \return the number of bytes read.
+ */
+size_t prog_read(struct _KFile *fd, void *buf, size_t size)
+{
+ ASSERT(fd->seek_pos + size <= fd->size);
+ size = MIN((uint32_t)size, fd->size - fd->seek_pos);
+
+ kprintf("Reading at pos[%d]\n", fd->seek_pos);
+ // Flush current buffered page (if modified).
+ prog_flush();
+
+ /*
+ * AVR pointers are 16 bits wide, this hack is needed to avoid
+ * compiler warning, cause fd->seek_pos is a 32bit offset.
+ */
+ const uint8_t *pgm_addr = (const uint8_t *)0;
+ pgm_addr += fd->seek_pos;
+
+ memcpy_P(buf, pgm_addr, size);
+ fd->seek_pos += size;
+ kprintf("Read %d bytes\n", size);
+ return size;
+}
+
projects / bertos.git / blobdiff