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https://github.com/fail0verflow/mini.git
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allow client apps to disable the safety check that normally prevents you
from overwriting boot1/boot2, using an IPC call. use with caution, see comments in source code.
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2
ipc.c
2
ipc.c
@ -30,7 +30,7 @@ Copyright (C) 2009 John Kelley <wiidev@kelley.ca>
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#include "panic.h"
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#define MINI_VERSION_MAJOR 1
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#define MINI_VERSION_MINOR 2
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#define MINI_VERSION_MINOR 3
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static volatile ipc_request in_queue[IPC_IN_SIZE] ALIGNED(32) MEM2_BSS;
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static volatile ipc_request out_queue[IPC_OUT_SIZE] ALIGNED(32) MEM2_BSS;
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2
ipc.h
2
ipc.h
@ -72,6 +72,8 @@ Copyright (C) 2009 John Kelley <wiidev@kelley.ca>
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#define IPC_NAND_WRITE 0x0003
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#define IPC_NAND_ERASE 0x0004
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#define IPC_NAND_STATUS 0x0005
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#define IPC_NAND_SETMINPAGE 0x0006
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#define IPC_NAND_GETMINPAGE 0x0007
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//#define IPC_NAND_USER0 0x8000
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//#define IPC_NAND_USER1 0x8001
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// etc.
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29
nand.c
29
nand.c
@ -25,11 +25,6 @@ Copyright (C) 2008, 2009 Hector Martin "marcan" <marcan@marcansoft.com>
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// #define NAND_DEBUG 1
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#define NAND_SUPPORT_WRITE 1
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#define NAND_SUPPORT_ERASE 1
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#ifdef ALLOW_BOOT2_WRITES
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#define NAND_MIN_PAGE 0x40
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#else
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#define NAND_MIN_PAGE 0x200
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#endif
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#ifdef NAND_DEBUG
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# include "gecko.h"
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@ -64,6 +59,7 @@ static u8 ipc_ecc[ECC_BUFFER_ALLOC] MEM2_BSS ALIGNED(128); //128 alignment REQUI
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static volatile int irq_flag;
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static u32 last_page_read = 0;
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static u32 nand_min_page = 0x200; // default to protecting boot1+boot2
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void nand_irq(void)
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{
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@ -211,7 +207,7 @@ void nand_write_page(u32 pageno, void *data, void *ecc) {
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NAND_debug("nand_write_page(%u, %p, %p)\n", pageno, data, ecc);
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// this is a safety check to prevent you from accidentally wiping out boot1 or boot2.
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if ((pageno < NAND_MIN_PAGE) || (pageno >= NAND_MAX_PAGE)) {
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if ((pageno < nand_min_page) || (pageno >= NAND_MAX_PAGE)) {
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gecko_printf("Error: nand_write to page %d forbidden\n", pageno);
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return;
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}
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@ -232,7 +228,7 @@ void nand_erase_block(u32 pageno) {
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NAND_debug("nand_erase_block(%d)\n", pageno);
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// this is a safety check to prevent you from accidentally wiping out boot1 or boot2.
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if ((pageno < NAND_MIN_PAGE) || (pageno >= NAND_MAX_PAGE)) {
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if ((pageno < nand_min_page) || (pageno >= NAND_MAX_PAGE)) {
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gecko_printf("Error: nand_erase to page %d forbidden\n", pageno);
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return;
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}
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@ -296,6 +292,7 @@ int nand_correct(u32 pageno, void *data, void *ecc)
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void nand_ipc(volatile ipc_request *req)
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{
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u32 new_min_page = 0x200;
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if (current_request.code != 0) {
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gecko_printf("NAND: previous IPC request is not done yet.");
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ipc_post(req->code, req->tag, 1, -1);
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@ -337,6 +334,24 @@ void nand_ipc(volatile ipc_request *req)
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nand_erase_block(req->args[0]);
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break;
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#endif
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/* This is only here to support the truly brave or stupid who are using hardware hacks to reflash
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boot1/boot2 onto blank or corrupted NAND flash chips. Best practices dictate that you should
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query minpage (and make sure it is the value you expect -- usually 0x200) before writing to NAND.
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If you call SETMINPAGE, you MUST then call GETMINPAGE to check that it actually succeeded, do your
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writes, and then as soon as possible call SETMINPAGE(0x200) to restore the default minimum page. */
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case IPC_NAND_SETMINPAGE:
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new_min_page = req->args[0];
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if (new_min_page > 0x200) {
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gecko_printf("Ignoring strange NAND_SETMINPAGE request: %u\n", new_min_page);
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break;
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}
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gecko_printf("WARNING: setting minimum allowed NAND page to %u\n", new_min_page);
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nand_min_page = new_min_page;
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ipc_post(req->code, req->tag, 0);
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break;
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case IPC_NAND_GETMINPAGE:
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ipc_post(req->code, req->tag, 1, nand_min_page);
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break;
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default:
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gecko_printf("IPC: unknown SLOW NAND request %04x\n",
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req->req);
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