initial commit

1 files changed, 203 insertions, 0 deletions

diff --git a/startup.c b/startup.c
new file mode 100644
index 0000000..12d8784
--- /dev/null
+++ b/startup.c
@@ -0,0 +1,203 @@
+/*
+ * Copyright © Matthew Wozniak <me@woz.blue>
+ *
+ * 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.
+ */
+
+/*
+ * This startup.c file is for the STM32F103C8T6 used on the bluepill boards, and
+ * while it may work for others I provide no guarntees.
+ */
+
+#include "intdefs.h"
+
+#define SRAM_START (0x20000000U)
+#define SRAM_SIZE (20U * 1024U)
+#define SRAM_END (SRAM_START + SRAM_SIZE)
+#define STACK_POINTER_INIT_ADDRESS (SRAM_END)
+
+#include <string.h>
+
+#define ISR_VECTOR_SIZE 76
+
+void reset_handler();
+void default_handler();
+void nmi_handler() __attribute__((weak, alias("default_handler")));
+void hardfault_handler() __attribute__((weak, alias("default_handler")));
+void memory_management_handler() __attribute__((weak, alias("default_handler")));
+void bus_fault_handler() __attribute__((weak, alias("default_handler")));
+void usage_fault_handler() __attribute__((weak, alias("default_handler")));
+void svcall_handler() __attribute__((weak, alias("default_handler")));
+void debug_monitor_handler() __attribute__((weak, alias("default_handler")));
+void pendsv_handler() __attribute__((weak, alias("default_handler")));
+void systick_handler() __attribute__((weak, alias("default_handler")));
+void wwdg_handler() __attribute__((weak, alias("default_handler")));
+void pvd_handler() __attribute__((weak, alias("default_handler")));
+void tamper_handler() __attribute__((weak, alias("default_handler")));
+void rtc_handler() __attribute__((weak, alias("default_handler")));
+void flash_handler() __attribute__((weak, alias("default_handler")));
+void rcc_handler() __attribute__((weak, alias("default_handler")));
+void exti0_handler() __attribute__((weak, alias("default_handler")));
+void exti1_handler() __attribute__((weak, alias("default_handler")));
+void exti2_handler() __attribute__((weak, alias("default_handler")));
+void exti3_handler() __attribute__((weak, alias("default_handler")));
+void exti4_handler() __attribute__((weak, alias("default_handler")));
+void dma1_channel1_handler() __attribute__((weak, alias("default_handler")));
+void dma1_channel2_handler() __attribute__((weak, alias("default_handler")));
+void dma1_channel3_handler() __attribute__((weak, alias("default_handler")));
+void dma1_channel4_handler() __attribute__((weak, alias("default_handler")));
+void dma1_channel5_handler() __attribute__((weak, alias("default_handler")));
+void dma1_channel6_handler() __attribute__((weak, alias("default_handler")));
+void dma1_channel7_handler() __attribute__((weak, alias("default_handler")));
+void adc_handler() __attribute__((weak, alias("default_handler")));
+void usbhp_cantx_handler() __attribute__((weak, alias("default_handler")));
+void usblp_canrx0_handler() __attribute__((weak, alias("default_handler")));
+void canrx1_handler() __attribute__((weak, alias("default_handler")));
+void cansce_handler() __attribute__((weak, alias("default_handler")));
+void exti9_5_handler() __attribute__((weak, alias("default_handler")));
+void tim1brk_handler() __attribute__((weak, alias("default_handler")));
+void tim1up_handler() __attribute__((weak, alias("default_handler")));
+void tim1trgcom_handler() __attribute__((weak, alias("default_handler")));
+void tim1cc_handler() __attribute__((weak, alias("default_handler")));
+void tim2_handler() __attribute__((weak, alias("default_handler")));
+void tim3_handler() __attribute__((weak, alias("default_handler")));
+void tim4_handler() __attribute__((weak, alias("default_handler")));
+void i2c1_ev_handler() __attribute__((weak, alias("default_handler")));
+void i2c1_er_handler() __attribute__((weak, alias("default_handler")));
+void i2c2_ev_handler() __attribute__((weak, alias("default_handler")));
+void i2c2_er_handler() __attribute__((weak, alias("default_handler")));
+void spi1_handler() __attribute__((weak, alias("default_handler")));
+void spi2_handler() __attribute__((weak, alias("default_handler")));
+void usart1_handler() __attribute__((weak, alias("default_handler")));
+void usart2_handler() __attribute__((weak, alias("default_handler")));
+void usart3_handler() __attribute__((weak, alias("default_handler")));
+void exti15_10_handler() __attribute__((weak, alias("default_handler")));
+void rtcalarm_handler() __attribute__((weak, alias("default_handler")));
+void usbwakeup_handler() __attribute__((weak, alias("default_handler")));
+void tim8brk_handler() __attribute__((weak, alias("default_handler")));
+void tim8up_handler() __attribute__((weak, alias("default_handler")));
+void tim8trgcom_handler() __attribute__((weak, alias("default_handler")));
+void tim8cc_handler() __attribute__((weak, alias("default_handler")));
+void adc3_handler() __attribute__((weak, alias("default_handler")));
+void fsmc_handler() __attribute__((weak, alias("default_handler")));
+void sdio_handler() __attribute__((weak, alias("default_handler")));
+void tim5_handler() __attribute__((weak, alias("default_handler")));
+void spi3_handler() __attribute__((weak, alias("default_handler")));
+void uart4_handler() __attribute__((weak, alias("default_handler")));
+void uart5_handler() __attribute__((weak, alias("default_handler")));
+void tim6_handler() __attribute__((weak, alias("default_handler")));
+void tim7_handler() __attribute__((weak, alias("default_handler")));
+void dma2_channel1_handler() __attribute__((weak, alias("default_handler")));
+void dma2_channel2_handler() __attribute__((weak, alias("default_handler")));
+void dma2_channel3_handler() __attribute__((weak, alias("default_handler")));
+void dma2_channel4_5_handler() __attribute__((weak, alias("default_handler")));
+
+void (*isr_vector[ISR_VECTOR_SIZE])() __attribute__((section(".isr_vector"))) = {
+	(void (*)())STACK_POINTER_INIT_ADDRESS,
+	reset_handler,
+	nmi_handler,
+	hardfault_handler,
+	memory_management_handler,
+	bus_fault_handler,
+	usage_fault_handler,
+	nullptr, /* reserved */
+	svcall_handler,
+	debug_monitor_handler,
+	nullptr, /* reserved */
+	nullptr,
+	nullptr,
+	nullptr,
+	pendsv_handler,
+	systick_handler,
+	wwdg_handler,
+	pvd_handler,
+	tamper_handler,
+	rtc_handler,
+	flash_handler,
+	rcc_handler,
+	exti0_handler,
+	exti1_handler,
+	exti2_handler,
+	exti3_handler,
+	exti4_handler,
+	dma1_channel1_handler,
+	dma1_channel2_handler,
+	dma1_channel3_handler,
+	dma1_channel4_handler,
+	dma1_channel5_handler,
+	dma1_channel6_handler,
+	dma1_channel7_handler,
+	adc_handler,
+	usbhp_cantx_handler,
+	usblp_canrx0_handler,
+	canrx1_handler,
+	cansce_handler,
+	exti9_5_handler,
+	tim1brk_handler,
+	tim1up_handler,
+	tim1trgcom_handler,
+	tim1cc_handler,
+	tim2_handler,
+	tim3_handler,
+	tim4_handler,
+	i2c1_ev_handler,
+	i2c1_er_handler,
+	i2c2_ev_handler,
+	i2c2_er_handler,
+	spi1_handler,
+	spi2_handler,
+	usart1_handler,
+	usart2_handler,
+	usart3_handler,
+	exti15_10_handler,
+	rtcalarm_handler,
+	usbwakeup_handler,
+	tim8brk_handler,
+	tim8up_handler,
+	tim8trgcom_handler,
+	tim8cc_handler,
+	adc3_handler,
+	fsmc_handler,
+	sdio_handler,
+	tim5_handler,
+	spi3_handler,
+	uart4_handler,
+	uart5_handler,
+	tim6_handler,
+	tim7_handler,
+	dma2_channel1_handler,
+	dma2_channel2_handler,
+	dma2_channel3_handler,
+	dma2_channel4_5_handler,
+};
+
+void default_handler() {
+	while (1) {}
+}
+
+extern u32 _etext, _sdata, _sidata, _edata, _sbss, _ebss;
+int main();
+
+void reset_handler() {
+	// copy .data from FLASH to SRAM
+	u32 data_sz = (u32)&_edata - (u32)&_sdata;
+	memcpy(&_sdata, &_sidata, data_sz);
+
+	// zero-fill .bss
+	memset(&_sbss, 0, (u32)&_ebss - (u32)&_sbss);
+
+	// run our program
+	main();
+}
+
+// vi: sw=4 ts=4 noet tw=80 cc=80