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firmware: keep directory tables within bank boundaries

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This commit is contained in:
Maximilian Rehkopf 2012-06-11 01:59:04 +02:00
parent 64b1b07333
commit 61c7014f85
1 changed files with 28 additions and 10 deletions
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38
src/filetypes.c
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@ -69,6 +69,7 @@ uint32_t scan_dir(char* path, FILINFO* fno_param, char mkdb, uint32_t this_dir_t
static uint16_t num_files_total = 0;
static uint16_t num_dirs_total = 0;
uint32_t dir_tgt;
uint32_t switched_dir_tgt = 0;
uint16_t numentries;
uint32_t dirsize;
uint8_t pass = 0;
@ -95,6 +96,15 @@ uint32_t scan_dir(char* path, FILINFO* fno_param, char mkdb, uint32_t this_dir_t
for(pass = 0; pass < 2; pass++) {
if(pass) {
dirsize = 4*(numentries);
if(((next_subdir_tgt + dirsize + 8) & 0xff0000) > (next_subdir_tgt & 0xff0000)) {
printf("switchdir! old=%lX ", next_subdir_tgt + dirsize + 4);
next_subdir_tgt &= 0xffff0000;
next_subdir_tgt += 0x00010004;
printf("new=%lx\n", next_subdir_tgt);
dir_tgt &= 0xffff0000;
dir_tgt += 0x00010004;
}
switched_dir_tgt = dir_tgt;
next_subdir_tgt += dirsize + 4;
if(parent_tgt) next_subdir_tgt += 4;
if(next_subdir_tgt > dir_end) {
@ -150,9 +160,11 @@ uint32_t scan_dir(char* path, FILINFO* fno_param, char mkdb, uint32_t this_dir_t
if(pass) {
path[len]='/';
strncpy(path+len+1, (char*)fn, sizeof(fs_path)-len);
uint16_t pathlen = 0;
uint32_t old_db_tgt = 0;
if(mkdb) {
uint16_t pathlen = strlen(path);
// printf("d=%d Saving %lx to Address %lx [dir]\n", depth, db_tgt, dir_tgt);
pathlen = strlen(path);
DBG_FS printf("d=%d Saving %lx to Address %lx [dir]\n", depth, db_tgt, dir_tgt);
/* save element:
- path name
- pointer to sub dir structure */
@ -162,20 +174,25 @@ uint32_t scan_dir(char* path, FILINFO* fno_param, char mkdb, uint32_t this_dir_t
db_tgt += 0x00010000;
printf("new=%lx\n", db_tgt);
}
// printf(" Saving dir descriptor to %lx tgt=%lx, path=%s\n", db_tgt, next_subdir_tgt, path);
/* write element pointer to current dir structure */
sram_writelong((db_tgt-SRAM_MENU_ADDR)|((uint32_t)0x80<<24), dir_tgt);
/* save element:
- path name
- pointer to sub dir structure */
sram_writelong((next_subdir_tgt-SRAM_MENU_ADDR), db_tgt);
sram_writebyte(len+1, db_tgt+sizeof(next_subdir_tgt));
sram_writeblock(path, db_tgt+sizeof(next_subdir_tgt)+sizeof(len), pathlen);
sram_writeblock("/\0", db_tgt + sizeof(next_subdir_tgt) + sizeof(len) + pathlen, 2);
- pointer to sub dir structure
moved below */
old_db_tgt = db_tgt;
db_tgt += sizeof(next_subdir_tgt) + sizeof(len) + pathlen + 2;
}
parent_tgt = this_dir_tgt;
scan_dir(path, &fno, mkdb, next_subdir_tgt);
/* scan subdir before writing current dir element to account for bank switches */
uint32_t corrected_subdir_tgt = scan_dir(path, &fno, mkdb, next_subdir_tgt);
if(mkdb) {
DBG_FS printf(" Saving dir descriptor to %lx tgt=%lx, path=%s\n", old_db_tgt, corrected_subdir_tgt, path);
sram_writelong((corrected_subdir_tgt-SRAM_MENU_ADDR), old_db_tgt);
sram_writebyte(len+1, old_db_tgt+sizeof(next_subdir_tgt));
sram_writeblock(path, old_db_tgt+sizeof(next_subdir_tgt)+sizeof(len), pathlen);
sram_writeblock("/\0", old_db_tgt + sizeof(next_subdir_tgt) + sizeof(len) + pathlen, 2);
}
dir_tgt += 4;
was_empty = 0;
}
@ -259,7 +276,8 @@ uint32_t scan_dir(char* path, FILINFO* fno_param, char mkdb, uint32_t this_dir_t
sram_writelong(dir_end, SRAM_DB_ADDR+8);
sram_writeshort(num_files_total, SRAM_DB_ADDR+12);
sram_writeshort(num_dirs_total, SRAM_DB_ADDR+14);
return crc;
if(depth==0) return crc;
else return switched_dir_tgt;
}