diff --git a/loader/Makefile b/loader/Makefile index 14298454..a3da1f06 100644 --- a/loader/Makefile +++ b/loader/Makefile @@ -7,10 +7,6 @@ include $(DEVKITARM)/base_rules ################################################################################ LDR_LOAD_ADDR := 0x40007000 -IPL_MAGIC := 0x43544349 #"ICTC" -LPVERSION_MAJOR := 4 -LPVERSION_MINOR := 0 -LPVERSION_BUGFX := 1 ################################################################################ @@ -32,7 +28,7 @@ CUSTOMDEFINES := -DBL_MAGIC=$(IPL_MAGIC) CUSTOMDEFINES += -DBL_VER_MJ=$(BLVERSION_MAJOR) -DBL_VER_MN=$(BLVERSION_MINOR) -DBL_VER_HF=$(BLVERSION_HOTFX) -DBL_RESERVED=$(BLVERSION_RSVD) #TODO: Considering reinstating some of these when pointer warnings have been fixed. -WARNINGS := -Wall -Wsign-compare -Wno-array-bounds -Wno-stringop-overflow +WARNINGS := -Wall -Wno-array-bounds -Wno-stringop-overflow ARCH := -march=armv4t -mtune=arm7tdmi -mthumb-interwork CFLAGS = $(ARCH) -O2 -g -nostdlib -ffunction-sections -fdata-sections -fomit-frame-pointer -std=gnu11 $(WARNINGS) $(CUSTOMDEFINES) diff --git a/loader/link.ld b/loader/link.ld index 81e10857..cf5cb17d 100644 --- a/loader/link.ld +++ b/loader/link.ld @@ -6,8 +6,6 @@ SECTIONS { .text : { *(.text._start); KEEP(*(._boot_cfg)); - KEEP(*(._ipl_version)); - KEEP(*(._octopus)); *(.text*); } .data : { @@ -15,14 +13,6 @@ SECTIONS { *(.rodata*); *(._payload_00); *(._payload_01); - - /* - * To mitigate bad injectors/chainloaders, - * miss-align binary size to account for version info. - * !If version text is not appended, then use ". = ALIGN(4)"! - */ - data_end_ua = .; - . = ((data_end_ua + 0x6 + 4 - 1) & ~(4 - 1)) - 6; } __ldr_end = .; . = ALIGN(0x10); diff --git a/loader/loader.c b/loader/loader.c index 7cff34ea..11e6018c 100644 --- a/loader/loader.c +++ b/loader/loader.c @@ -30,70 +30,43 @@ #define IPL_PATCHED_RELOC_SZ 0x94 boot_cfg_t __attribute__((section ("._boot_cfg"))) b_cfg; -const volatile ipl_ver_meta_t __attribute__((section ("._ipl_version"))) ipl_ver = { - .magic = BL_MAGIC, - .version = (BL_VER_MJ + '0') | ((BL_VER_MN + '0') << 8) | ((BL_VER_HF + '0') << 16), - .rsvd0 = 0, - .rsvd1 = 0 -}; - -const volatile char __attribute__((section ("._octopus"))) octopus[] = - "\n" - " ___\n" - " .-' `'.\n" - " / \\\n" - " | ;\n" - " | | ___.--,\n" - " _.._ |0) = (0) | _.---'`__.-( (_.\n" - " __.--'`_.. '.__.\\ '--. \\_.-' ,.--'` `\"\"`\n" - " ( ,.--'` ',__ /./; ;, '.__.'` __\n" - " _`) ) .---.__.' / | |\\ \\__..--\"\" \"\"\"--.,_\n" - " `---' .'.''-._.-'`_./ /\\ '. \\ _.--''````'''--._`-.__.'\n" - " | | .' _.-' | | \\ \\ '. `----`\n" - " \\ \\/ .' \\ \\ '. '-._)\n" - " \\/ / \\ \\ `=.__`'-.\n" - " / /\\ `) ) / / `\"\".`\\\n" - " , _.-'.'\\ \\ / / ( ( / /\n" - " `--'` ) ) .-'.' '.'. | (\n" - " (/` ( (` ) ) '-; [switchbrew]\n"; void loader_main() { // Preliminary BPMP clocks init. - CLOCK(CLK_RST_CONTROLLER_CLK_SYSTEM_RATE) = 0x10; // Set HCLK div to 2 and PCLK div to 1. - CLOCK(CLK_RST_CONTROLLER_CLK_SOURCE_SYS) = 0; // Set SCLK div to 1. - CLOCK(CLK_RST_CONTROLLER_SCLK_BURST_POLICY) = 0x20004444; // Set clk source to Run and PLLP_OUT2 (204MHz). + CLOCK(CLK_RST_CONTROLLER_CLK_SYSTEM_RATE) = 0x10; // Set HCLK div to 2 and PCLK div to 1. + CLOCK(CLK_RST_CONTROLLER_CLK_SOURCE_SYS) = 0; // Set SCLK div to 1. + CLOCK(CLK_RST_CONTROLLER_SCLK_BURST_POLICY) = 0x20004444; // Set clk source to Run and PLLP_OUT2 (204MHz). CLOCK(CLK_RST_CONTROLLER_SUPER_SCLK_DIVIDER) = 0x80000000; // Enable SUPER_SDIV to 1. - CLOCK(CLK_RST_CONTROLLER_CLK_SYSTEM_RATE) = 2; // Set HCLK div to 1 and PCLK div to 3. - CLOCK(CLK_RST_CONTROLLER_SCLK_BURST_POLICY) = 0x20003333; // Set SCLK to PLLP_OUT (408MHz). + CLOCK(CLK_RST_CONTROLLER_CLK_SYSTEM_RATE) = 2; // Set HCLK div to 1 and PCLK div to 3. + CLOCK(CLK_RST_CONTROLLER_SCLK_BURST_POLICY) = 0x20003333; // Set SCLK to PLLP_OUT (408MHz). - // Get Payload size. - u32 payload_size = sizeof(payload_00) + sizeof(payload_01); // Actual payload size. - payload_size += (u32)payload_01 - (u32)payload_00 - sizeof(payload_00); // Add compiler alignment. - payload_size = ALIGN(payload_size, 4); // Align size to 4 bytes. + // Get Loader and Payload size. + u32 payload_size = sizeof(payload_00) + sizeof(payload_01); // Actual payload size. + payload_size += (u32)payload_01 - (u32)payload_00 - sizeof(payload_00); // Add array alignment. u32 *payload_addr = (u32 *)payload_00; // Relocate payload to a safer place. - u32 words = payload_size >> 2; - u32 *src = payload_addr + words - 1; - u32 *dst = (u32 *)(IPL_RELOC_TOP - 4); - while (words) + u32 bytes = ALIGN(payload_size, 4) >> 2; + u32 *addr = payload_addr + bytes - 1; + u32 *dst = (u32 *)(IPL_RELOC_TOP - 4); + while (bytes) { - *dst = *src; - src--; + *dst = *addr; dst--; - words--; + addr--; + bytes--; } // Set source address of the first part. - u8 *src_addr = (void *)(IPL_RELOC_TOP - payload_size); + u8 *src_addr = (void *)(IPL_RELOC_TOP - ALIGN(payload_size, 4)); // Uncompress first part. - u32 dst_pos = LZ_Uncompress((const u8 *)src_addr, (u8 *)IPL_LOAD_ADDR, sizeof(payload_00)); + u32 dst_pos = LZ_Uncompress((const u8 *)src_addr, (u8*)IPL_LOAD_ADDR, sizeof(payload_00)); - // Set source address of the second part. Includes compiler alignment. + // Set source address of the second part. Includes array alignment. src_addr += (u32)payload_01 - (u32)payload_00; // Uncompress second part. - LZ_Uncompress((const u8 *)src_addr, (u8 *)IPL_LOAD_ADDR + dst_pos, sizeof(payload_01)); + LZ_Uncompress((const u8 *)src_addr, (u8*)IPL_LOAD_ADDR + dst_pos, sizeof(payload_01)); // Copy over boot configuration storage. memcpy((u8 *)(IPL_LOAD_ADDR + IPL_PATCHED_RELOC_SZ), &b_cfg, sizeof(boot_cfg_t));