TE smol edition

Makefile made by dennthecafebabe

loader/Makefile

@@ -0,0 +1,60 @@
+ifeq ($(strip $(DEVKITARM)),)
+$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
+endif
+
+include $(DEVKITARM)/base_rules
+
+################################################################################
+
+LDR_LOAD_ADDR := 0x40007000
+
+################################################################################
+
+TARGET := loader
+BUILDDIR := ../build
+OUTPUTDIR := ../output
+BDKDIR := bdk
+BDKINC := -I../$(BDKDIR)
+VPATH += $(dir $(wildcard ../$(BDKDIR)/*/)) $(dir $(wildcard ../$(BDKDIR)/*/*/))
+
+# Main and graphics.
+OBJS = $(addprefix $(BUILDDIR)/$(TARGET)/, \
+	start.o loader.o lz.o \
+)
+
+################################################################################
+
+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)
+
+ARCH := -march=armv4t -mtune=arm7tdmi -mthumb-interwork
+CFLAGS = $(ARCH) -O2 -g -nostdlib -ffunction-sections -fdata-sections -fomit-frame-pointer -std=gnu11 -Wall $(CUSTOMDEFINES)
+LDFLAGS = $(ARCH) -nostartfiles -lgcc -Wl,--nmagic,--gc-sections -Xlinker --defsym=LDR_LOAD_ADDR=$(LDR_LOAD_ADDR)
+
+################################################################################
+
+.PHONY: all clean
+
+all: $(TARGET).bin $(TOOLSLZ) $(TOOLSB2C)
+
+clean:
+	@rm -rf $(OBJS)
+
+$(TARGET).bin: $(BUILDDIR)/$(TARGET)/$(TARGET).elf
+	$(OBJCOPY) -S -O binary $< $(OUTPUTDIR)/$(PAYLOAD_NAME).bin
+
+$(BUILDDIR)/$(TARGET)/$(TARGET).elf: $(OBJS)
+	@$(CC) $(LDFLAGS) -T link.ld $^ -o $@
+
+$(BUILDDIR)/$(TARGET)/%.o: %.c
+	@$(CC) $(CFLAGS) $(BDKINC) -c $< -o $@
+
+$(BUILDDIR)/$(TARGET)/%.o: %.S
+	@$(CC) $(CFLAGS) -c $< -o $@
+
+$(OBJS): $(BUILDDIR)/$(TARGET)
+
+$(BUILDDIR)/$(TARGET):
+	@mkdir -p "$(BUILDDIR)"
+	@mkdir -p "$(BUILDDIR)/$(TARGET)"
+	@mkdir -p "$(OUTPUTDIR)"

loader/link.ld

@@ -0,0 +1,20 @@
+ENTRY(_start)
+
+SECTIONS {
+	PROVIDE(__ipl_start = LDR_LOAD_ADDR);
+	. = __ipl_start;
+	.text : {
+		*(.text._start);
+		*(._boot_cfg);
+		*(.text*);
+	}
+	.data : {
+		*(.data*);
+		*(.rodata*);
+		*(._payload_00);
+		*(._payload_01);
+	}
+	__ldr_end = .;
+	. = ALIGN(0x10);
+	__ipl_end = .;
+}

loader/loader.c

@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2019 CTCaer
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "payload_00.h"
+#include "payload_01.h"
+
+#include <memory_map.h>
+#include <libs/compr/lz.h>
+#include <soc/clock.h>
+#include <soc/t210.h>
+
+// 0x4003D000: Safe for panic preserving, 0x40038000: Safe for debugging needs.
+#define IPL_RELOC_TOP  0x40038000
+#define IPL_PATCHED_RELOC_SZ 0x94
+
+boot_cfg_t __attribute__((section ("._boot_cfg"))) b_cfg;
+
+void loader_main()
+{
+	// Preserve sections.
+	__asm__ ("" : : "" (b_cfg));
+
+	// 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_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).
+
+	// Get Loader and Payload size.
+	u32 payload_size = sizeof(payload_00) + sizeof(payload_01);
+	u32 *payload_addr = (u32 *)payload_00;
+
+	// Relocate payload to a safer place.
+	u32 bytes = ALIGN(payload_size, 4) >> 2;
+	u32 *addr = payload_addr + bytes - 1;
+	u32 *dst = (u32 *)(IPL_RELOC_TOP - 4);
+	while (bytes)
+	{
+		*dst = *addr;
+		dst--;
+		addr--;
+		bytes--;
+	}
+
+	// Uncompress payload parts.
+	u8 *src_addr = (void *)(IPL_RELOC_TOP - ALIGN(payload_size, 4));
+	u32 pos = LZ_Uncompress((const u8 *)src_addr, (u8*)IPL_LOAD_ADDR, sizeof(payload_00));
+	src_addr += (u32)payload_01 - (u32)payload_00;
+	LZ_Uncompress((const u8 *)src_addr, (u8*)IPL_LOAD_ADDR + pos, sizeof(payload_01));
+
+	// Copy over boot configuration storage in case it was set.
+	memcpy((u8 *)(IPL_LOAD_ADDR + IPL_PATCHED_RELOC_SZ), &b_cfg, sizeof(boot_cfg_t));
+
+	// Chainload.
+	void (*ipl_ptr)() = (void *)IPL_LOAD_ADDR;
+	(*ipl_ptr)();
+
+	// Halt if we managed to get out of execution.
+	while (true)
+		;
+}

loader/start.S

@@ -0,0 +1,73 @@
+/*
+* Copyright (c) 2018 naehrwert
+*
+* This program is free software; you can redistribute it and/or modify it
+* under the terms and conditions of the GNU General Public License,
+* version 2, as published by the Free Software Foundation.
+*
+* This program is distributed in the hope it will be useful, but WITHOUT
+* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+* more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+.section .text._start
+.arm
+
+.extern _reloc_ipl
+.type _reloc_ipl, %function
+
+.extern memset
+.type memset, %function
+
+.extern loader_main
+.type loader_main, %function
+
+.globl _start
+.type _start, %function
+_start:
+	ADR R0, _start
+	LDR R1, =__ipl_start
+	CMP R0, R1
+	BEQ _real_start
+
+	/* If we are not in the right location already, copy a relocator to upper IRAM. */
+	ADR R2, _reloc_ipl
+	LDR R3, =0x4003FF00
+	MOV R4, #(_real_start - _reloc_ipl)
+_copy_loop:
+	LDMIA R2!, {R5}
+	STMIA R3!, {R5}
+	SUBS R4, #4
+	BNE _copy_loop
+
+	/* Use the relocator to copy ourselves into the right place. */
+	LDR R2, =__ipl_end
+	SUB R2, R2, R1
+	LDR R3, =_real_start
+	LDR R4, =0x4003FF00
+	BX R4
+
+_reloc_ipl:
+	LDMIA R0!, {R4-R7}
+	STMIA R1!, {R4-R7}
+	SUBS R2, #0x10
+	BNE _reloc_ipl
+	/* Jump to the relocated entry. */
+	BX R3
+
+_real_start:
+	/* Initially, we place our stack in IRAM but will move it to SDRAM later. */
+	LDR SP, =0x40007000
+	LDR R0, =__ldr_end
+	BL loader_main
+	B .
+	.word 0
+	.word 0
+	.word 0
+	.word 0
+	.word 0
+	.word 0