2000/1107/bitsy/devflash.c (diff list | history)

2000/1031/sys/src/9/bitsy/devflash.c:15,17 – 2000/1107/sys/src/9/bitsy/devflash.c:15,74 (short | long | prev | next)
2000/1031		ulong start; /* byte offsets */ ulong end; };
2000/1107		static ulong *flash = (ulong*)FLASHZERO; /* * on the bitsy, all 32 bit accesses to flash are mapped to two 16 bit * accesses, one to the low half of the chip and the other to the high * half. Therefore for all command accesses, ushort indices in the * manuals turn into ulong indices in our code. Also, by copying all * 16 bit commands to both halves of a 32 bit command, we erase 2 * sectors for each request erase request. */ /* * common flash memory interface */ enum { CFIidoff= 0x10, CFIsysoff= 0x1B, CFIgeomoff= 0x27, }; struct CFIid { ulong q; ulong r; ulong y; ulong cmd_set; ulong vendor_alg; ulong ext_alg_addr[2]; ulong alt_cmd_set; ulong alt_vendor_alg; ulong alt_ext_ald_addr[2]; }; struct CFIsys { ulong vcc_min; /* 100 mv */ ulong vcc_max; ulong vpp_min; ulong vpp_max; ulong word_wr_to; /* 2**n µs */ ulong buf_wr_to; /* 2**n µs */ ulong block_erase_to; /* 2**n ms */ ulong chip_erase_to; /* 2**n ms */ ulong max_word_wr_to; /* 2**n µs */ ulong max_buf_wr_to; /* 2**n µs */ ulong max_block_erase_to; /* 2**n ms */ ulong max_chip_erase_to; /* 2**n ms */ }; struct CFIgeom { ulong size; /* 2**n bytes */ ulong };