From 172d694cf7ba582635ac38454bad0f0fdaa14773 Mon Sep 17 00:00:00 2001
From: Vegard Storheil Eriksen <zyp@jvnv.net>
Date: Sat, 16 Jan 2021 01:25:21 +0100
Subject: interrupt: Generate interrupts from platform spec.

---
 interrupt/SConscript              |  18 +++++
 interrupt/default_handlers.cpp.j2 |  19 +++++
 interrupt/fault.cpp               |  45 -----------
 interrupt/interrupt.cpp           | 159 --------------------------------------
 interrupt/interrupt.h             |  87 ++-------------------
 interrupt/interrupt_enums.h.j2    |  13 ++++
 interrupt/vectors_nvic.cpp.j2     |  28 +++++++
 7 files changed, 85 insertions(+), 284 deletions(-)
 create mode 100644 interrupt/SConscript
 create mode 100644 interrupt/default_handlers.cpp.j2
 delete mode 100644 interrupt/fault.cpp
 delete mode 100644 interrupt/interrupt.cpp
 create mode 100644 interrupt/interrupt_enums.h.j2
 create mode 100644 interrupt/vectors_nvic.cpp.j2

(limited to 'interrupt')

diff --git a/interrupt/SConscript b/interrupt/SConscript
new file mode 100644
index 0000000..c94bde8
--- /dev/null
+++ b/interrupt/SConscript
@@ -0,0 +1,18 @@
+Import('env')
+
+sources = []
+
+interrupt_controller = env['PLATFORM_SPEC'].get('interrupt_controller')
+
+exceptions = env['PLATFORM_SPEC'].get('exception', {})
+irqs = env['PLATFORM_SPEC'].get('irq', {})
+
+env.Jinja2('interrupt_enums.h', 'interrupt_enums.h.j2', exceptions = exceptions, irqs = irqs),
+
+if interrupt_controller == 'nvic':
+    sources.extend([
+        env.Jinja2('vectors_nvic.cpp', 'vectors_nvic.cpp.j2', exceptions = exceptions, irqs = irqs),
+        env.Jinja2('default_handlers.cpp', 'default_handlers.cpp.j2', exceptions = exceptions, irqs = irqs),
+    ])
+
+Return('sources')
diff --git a/interrupt/default_handlers.cpp.j2 b/interrupt/default_handlers.cpp.j2
new file mode 100644
index 0000000..cc4c16d
--- /dev/null
+++ b/interrupt/default_handlers.cpp.j2
@@ -0,0 +1,19 @@
+#include "interrupt.h"
+
+extern "C" void default_blocking_handler() {
+	while(1);
+}
+
+{% for exc in exceptions.values() %}
+template<>
+[[gnu::weak, gnu::alias("default_blocking_handler")]]
+void interrupt<Exception::{{ exc }}>();
+
+{% endfor %}
+
+{% for irq in irqs.values() %}
+template<>
+[[gnu::weak, gnu::alias("default_blocking_handler")]]
+void interrupt<IRQ::{{ irq }}>();
+
+{% endfor %}
diff --git a/interrupt/fault.cpp b/interrupt/fault.cpp
deleted file mode 100644
index 0d91c1d..0000000
--- a/interrupt/fault.cpp
+++ /dev/null
@@ -1,45 +0,0 @@
-#include "interrupt.h"
-#include <os/thread.h>
-#include <os/time.h>
-
-inline void __attribute__((naked)) switch_context() {
-	#if ! (defined(STM32F0) || defined(STM32L0)) // TODO: cortex-m0/+ unsupported for now.
-	
-	asm volatile ("cpsid i");
-	
-	// Save unsaved registers.
-	asm volatile ("push {r4, r5, r6, r7, r8, r9, r10, r11, lr}" ::: "memory");
-	
-	// Store stack pointer for old thread.
-	asm volatile ("str sp, [%0]" :: "r" (&Thread::active_thread->sp));
-	
-	// Update running thread.
-	Thread::active_thread = Thread::active_thread->next;
-	
-	// Fetch stack pointer for new thread.
-	asm volatile ("ldr sp, [%0]" :: "r" (&Thread::active_thread->sp));
-	
-	asm volatile ("cpsie i");
-	
-	// Load registers and return.
-	asm volatile ("pop {r4, r5, r6, r7, r8, r9, r10, r11, pc}" ::: "memory");
-	
-	#endif
-}
-
-template<>
-void interrupt<Interrupt::SVCall>() {
-	switch_context();
-}
-
-template<>
-void interrupt<Interrupt::SysTick>() {
-	Time::tick();
-}
-
-template<> void interrupt<Interrupt::NMI>()         { while(1); }
-template<> void interrupt<Interrupt::HardFault>()   { while(1); }
-template<> void interrupt<Interrupt::MemManage>()   { while(1); }
-template<> void interrupt<Interrupt::BusFault>()    { while(1); }
-template<> void interrupt<Interrupt::UsageFault>()  { while(1); }
-template<> void interrupt<Interrupt::PendSV>()      { while(1); }
diff --git a/interrupt/interrupt.cpp b/interrupt/interrupt.cpp
deleted file mode 100644
index b50c01e..0000000
--- a/interrupt/interrupt.cpp
+++ /dev/null
@@ -1,159 +0,0 @@
-#include "interrupt.h"
-
-void entry();
-
-extern "C" void unused_interrupt() {
-	//while(1);
-}
-
-template<> void interrupt<Interrupt::NMI>()             __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::HardFault>()       __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::MemManage>()       __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::BusFault>()        __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::UsageFault>()      __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::SVCall>()          __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::PendSV>()          __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::SysTick>()         __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::WWDG>()            __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::PVD>()             __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::TAMPER>()          __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::RTC>()             __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::FLASH>()           __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::RCC>()             __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::EXTI0>()           __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::EXTI1>()           __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::EXTI2>()           __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::EXTI3>()           __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::EXTI4>()           __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::DMA1_Channel1>()   __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::DMA1_Channel2>()   __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::DMA1_Channel3>()   __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::DMA1_Channel4>()   __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::DMA1_Channel5>()   __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::DMA1_Channel6>()   __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::DMA1_Channel7>()   __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::ADC1_2>()          __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::USB_HP_CAN_TX>()   __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::USB_LP_CAN_RX0>()  __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::CAN_RX1>()         __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::CAN_SCE>()         __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::EXTI9_5>()         __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::TIM1_BRK>()        __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::TIM1_UP>()         __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::TIM1_TRG_COM>()    __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::TIM1_CC>()         __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::TIM2>()            __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::TIM3>()            __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::TIM4>()            __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::I2C1_EV>()         __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::I2C1_ER>()         __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::I2C2_EV>()         __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::I2C2_ER>()         __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::SPI1>()            __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::SPI2>()            __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::USART1>()          __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::USART2>()          __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::USART3>()          __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::EXTI15_10>()       __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::RTCAlarm>()        __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::USBWakeup>()       __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::TIM8_BRK>()        __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::TIM8_UP>()         __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::TIM8_TRG_COM>()    __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::TIM8_CC>()         __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::ADC3>()            __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::FSMC>()            __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::SDIO>()            __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::TIM5>()            __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::SPI3>()            __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::UART4>()           __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::UART5>()           __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::TIM6>()            __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::TIM7>()            __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::DMA2_Channel1>()   __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::DMA2_Channel2>()   __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::DMA2_Channel3>()   __attribute__ ((weak, alias ("unused_interrupt")));
-template<> void interrupt<Interrupt::DMA2_Channel4_5>() __attribute__ ((weak, alias ("unused_interrupt")));
-
-typedef void (*vector_t)();
-
-extern uint32_t _ram_end;
-
-vector_t vectors[] __attribute__((section(".vectors"))) = {
-	(vector_t)&_ram_end,
-	entry,
-	interrupt<Interrupt::NMI>,
-	interrupt<Interrupt::HardFault>,
-	interrupt<Interrupt::MemManage>,
-	interrupt<Interrupt::BusFault>,
-	interrupt<Interrupt::UsageFault>,
-	0,
-	0,
-	0,
-	0,
-	interrupt<Interrupt::SVCall>,
-	0,
-	0,
-	interrupt<Interrupt::PendSV>,
-	interrupt<Interrupt::SysTick>,
-	interrupt<Interrupt::WWDG>,
-	interrupt<Interrupt::PVD>,
-	interrupt<Interrupt::TAMPER>,
-	interrupt<Interrupt::RTC>,
-	interrupt<Interrupt::FLASH>,
-	interrupt<Interrupt::RCC>,
-	interrupt<Interrupt::EXTI0>,
-	interrupt<Interrupt::EXTI1>,
-	interrupt<Interrupt::EXTI2>,
-	interrupt<Interrupt::EXTI3>,
-	interrupt<Interrupt::EXTI4>,
-	interrupt<Interrupt::DMA1_Channel1>,
-	interrupt<Interrupt::DMA1_Channel2>,
-	interrupt<Interrupt::DMA1_Channel3>,
-	interrupt<Interrupt::DMA1_Channel4>,
-	interrupt<Interrupt::DMA1_Channel5>,
-	interrupt<Interrupt::DMA1_Channel6>,
-	interrupt<Interrupt::DMA1_Channel7>,
-	interrupt<Interrupt::ADC1_2>,
-	interrupt<Interrupt::USB_HP_CAN_TX>,
-	interrupt<Interrupt::USB_LP_CAN_RX0>,
-	interrupt<Interrupt::CAN_RX1>,
-	interrupt<Interrupt::CAN_SCE>,
-	interrupt<Interrupt::EXTI9_5>,
-	interrupt<Interrupt::TIM1_BRK>,
-	interrupt<Interrupt::TIM1_UP>,
-	interrupt<Interrupt::TIM1_TRG_COM>,
-	interrupt<Interrupt::TIM1_CC>,
-	interrupt<Interrupt::TIM2>,
-	interrupt<Interrupt::TIM3>,
-	interrupt<Interrupt::TIM4>,
-	interrupt<Interrupt::I2C1_EV>,
-	interrupt<Interrupt::I2C1_ER>,
-	interrupt<Interrupt::I2C2_EV>,
-	interrupt<Interrupt::I2C2_ER>,
-	interrupt<Interrupt::SPI1>,
-	interrupt<Interrupt::SPI2>,
-	interrupt<Interrupt::USART1>,
-	interrupt<Interrupt::USART2>,
-	interrupt<Interrupt::USART3>,
-	interrupt<Interrupt::EXTI15_10>,
-	interrupt<Interrupt::RTCAlarm>,
-	interrupt<Interrupt::USBWakeup>,
-	interrupt<Interrupt::TIM8_BRK>,
-	interrupt<Interrupt::TIM8_UP>,
-	interrupt<Interrupt::TIM8_TRG_COM>,
-	interrupt<Interrupt::TIM8_CC>,
-	interrupt<Interrupt::ADC3>,
-	interrupt<Interrupt::FSMC>,
-	interrupt<Interrupt::SDIO>,
-	interrupt<Interrupt::TIM5>,
-	interrupt<Interrupt::SPI3>,
-	interrupt<Interrupt::UART4>,
-	interrupt<Interrupt::UART5>,
-	interrupt<Interrupt::TIM6>,
-	interrupt<Interrupt::TIM7>,
-	interrupt<Interrupt::DMA2_Channel1>,
-	interrupt<Interrupt::DMA2_Channel2>,
-	interrupt<Interrupt::DMA2_Channel3>,
-	interrupt<Interrupt::DMA2_Channel4_5>,
-};
diff --git a/interrupt/interrupt.h b/interrupt/interrupt.h
index 0851c87..b87abef 100644
--- a/interrupt/interrupt.h
+++ b/interrupt/interrupt.h
@@ -3,6 +3,8 @@
 
 #include <stdint.h>
 
+#include "interrupt_enums.h"
+
 struct NVIC_t {
 	volatile uint32_t ISER[32];
 	volatile uint32_t ICER[32];
@@ -34,98 +36,23 @@ struct SCB_t {
 static SCB_t& SCB = *(SCB_t*)0xe000ed00;
 
 namespace Interrupt {
-	enum Exception {
-		NMI        = 2,
-		HardFault  = 3,
-		MemManage  = 4,
-		BusFault   = 5,
-		UsageFault = 6,
-		SVCall     = 11,
-		PendSV     = 14,
-		SysTick    = 15
-	};
-	
-	enum IRQ {
-		WWDG,
-		PVD,
-		TAMPER,
-		RTC,
-		FLASH,
-		RCC,
-		EXTI0,
-		EXTI1,
-		EXTI2,
-		EXTI3,
-		EXTI4,
-		DMA1_Channel1,
-		DMA1_Channel2,
-		DMA1_Channel3,
-		DMA1_Channel4,
-		DMA1_Channel5,
-		DMA1_Channel6,
-		DMA1_Channel7,
-		ADC1_2,
-		USB_HP_CAN_TX,
-		USB_LP_CAN_RX0,
-		CAN_RX1,
-		CAN_SCE,
-		EXTI9_5,
-		TIM1_BRK,
-		TIM1_UP,
-		TIM1_TRG_COM,
-		TIM1_CC,
-		TIM2,
-		TIM3,
-		TIM4,
-		I2C1_EV,
-		I2C1_ER,
-		I2C2_EV,
-		I2C2_ER,
-		SPI1,
-		SPI2,
-		USART1,
-		USART2,
-		USART3,
-		EXTI15_10,
-		RTCAlarm,
-		USBWakeup,
-		TIM8_BRK,
-		TIM8_UP,
-		TIM8_TRG_COM,
-		TIM8_CC,
-		ADC3,
-		FSMC,
-		SDIO,
-		TIM5,
-		SPI3,
-		UART4,
-		UART5,
-		TIM6,
-		TIM7,
-		DMA2_Channel1,
-		DMA2_Channel2,
-		DMA2_Channel3,
-		DMA2_Channel4_5,
-		NUM_IRQs
-	};
-	
 	inline void enable(IRQ n) {
-		NVIC.ISER[n >> 5] = 1 << (n & 0x1f);
+		NVIC.ISER[int(n) >> 5] = 1 << (int(n) & 0x1f);
 	}
 	
 	inline void set_priority(Exception n, uint8_t priority) {
-		SCB.SHPR[n - 4] = priority;
+		SCB.SHPR[int(n) - 4] = priority;
 	}
 	
 	inline void set_priority(IRQ n, uint8_t priority) {
-		NVIC.IPR[n] = priority;
+		NVIC.IPR[int(n)] = priority;
 	}
 };
 
-template<Interrupt::Exception>
+template<Exception>
 void interrupt();
 
-template<Interrupt::IRQ>
+template<IRQ>
 void interrupt();
 
 #endif
diff --git a/interrupt/interrupt_enums.h.j2 b/interrupt/interrupt_enums.h.j2
new file mode 100644
index 0000000..cc05100
--- /dev/null
+++ b/interrupt/interrupt_enums.h.j2
@@ -0,0 +1,13 @@
+#pragma once
+
+enum class Exception {
+    {% for num, name in exceptions.items() %}
+        {{ name }} = {{ num }},
+    {% endfor %}
+};
+
+enum class IRQ {
+    {% for num, name in irqs.items() %}
+        {{ name }} = {{ num }},
+    {% endfor %}
+};
diff --git a/interrupt/vectors_nvic.cpp.j2 b/interrupt/vectors_nvic.cpp.j2
new file mode 100644
index 0000000..e4293f3
--- /dev/null
+++ b/interrupt/vectors_nvic.cpp.j2
@@ -0,0 +1,28 @@
+#include "interrupt.h"
+
+void entry();
+extern uint32_t _ram_end;
+
+typedef void (*vector_t)();
+
+[[gnu::section(".vectors")]]
+vector_t vectors[] = {
+	(vector_t)&_ram_end,
+	entry,
+
+    {% for i in range(2, 16) %}
+        {% if i in exceptions %}
+    interrupt<Exception::{{ exceptions[i] }}>,
+        {% else %}
+    0,
+        {% endif %}
+    {% endfor %}
+
+    {% for i in range(irqs | max + 1 if irqs else 0) %}
+        {% if i in irqs %}
+    interrupt<IRQ::{{ irqs[i] }}>,
+        {% else %}
+    0,
+        {% endif %}
+    {% endfor %}
+};
-- 
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