From 58b5c8ba417fe99c01d9a48731b887ce434e797e Mon Sep 17 00:00:00 2001 From: Benji Dial Date: Fri, 27 Dec 2019 17:19:51 -0500 Subject: lots of new stuff. new memory manager, some stuff on file plumbing --- src/kernel/gpt.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 src/kernel/gpt.c (limited to 'src/kernel/gpt.c') diff --git a/src/kernel/gpt.c b/src/kernel/gpt.c new file mode 100644 index 0000000..32185eb --- /dev/null +++ b/src/kernel/gpt.c @@ -0,0 +1,40 @@ +/* +Copyright 2019 Benji Dial + +Permission to use, copy, modify, and/or distribute this +software for any purpose with or without fee is hereby +granted, provided that the above copyright notice and this +permission notice appear in all copies. + +THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS +ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO +EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, +INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER +RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, +ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE +OF THIS SOFTWARE. +*/ + +#include "gpt.h" +#include "files.h" +#include "diskio.h" + +bool gpt_parse_pt(uint8_t dn, uint8_t *buffer) { + struct gpt_header *head = (struct gpt_header *)&buffer[0x200]; + struct drive_parts *pi = part_info + dn; + pi->format = GPT; + pi->n_partitions = (head->n_parts & 0xffffff00 ? 0x000000ff : head->n_parts); + uint32_t part_entry_size = head->part_size; + struct gpt_entry *as_entries = (struct gpt_entry *)buffer; + for (uint8_t i = 0; i < pi->n_partitions; ++i) { + if (!(i % 8)) + read_sectors(dn, 2 + i / 4, 2, buffer); + pi->partition_sizes[i] = ((as_entries[i % 8].last_sector + 1) >> 1) - (pi->partition_offsets[i] = ((as_entries[i % 8].sector) >> 1)); + switch (as_entries[i % 8].id.le) { + //TODO + } + } + return true; +} \ No newline at end of file -- cgit v1.2.3