From dc75de29f4ffc0bcec5a750ec4c53e990e949a41 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Fri, 1 Jan 2010 15:16:01 +0000
Subject: [PATCH] Add SAM3U interrupt vector logic
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2475 42af7a65-404d-4744-a932-0658087f49c3
---
arch/arm/include/sam3u/irq.h | 118 ++++++++--
arch/arm/src/sam3u/Make.defs | 2 +-
arch/arm/src/sam3u/sam3u_memorymap.h | 54 ++---
arch/arm/src/sam3u/sam3u_vectors.S | 339 +++++++++++++++++++++++++++
4 files changed, 469 insertions(+), 44 deletions(-)
create mode 100755 arch/arm/src/sam3u/sam3u_vectors.S
diff --git a/arch/arm/include/sam3u/irq.h b/arch/arm/include/sam3u/irq.h
index 0929536434..16f7ba3a5a 100755
--- a/arch/arm/include/sam3u/irq.h
+++ b/arch/arm/include/sam3u/irq.h
@@ -1,4 +1,4 @@
-/****************************************************************************
+/****************************************************************************************
* arch/arm/include/sam3u/irq.h
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
@@ -31,7 +31,7 @@
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
- ****************************************************************************/
+ ****************************************************************************************/
/* This file should never be included directed but, rather,
* only indirectly through nuttx/irq.h
@@ -40,33 +40,119 @@
#ifndef __ARCH_ARM_INCLUDE_SAM3U_IRQ_H
#define __ARCH_ARM_INCLUDE_SAM3U_IRQ_H
-/****************************************************************************
+/****************************************************************************************
* Included Files
- ****************************************************************************/
+ ****************************************************************************************/
-/****************************************************************************
+/****************************************************************************************
* Definitions
- ****************************************************************************/
+ ****************************************************************************************/
-/* SAM3U Interrupts */
+/* SAM3U Peripheral Identifiers */
-#define NR_IRQS (0) /* For now *.
+#define SAM3U_PID_SUPC (0) /* Supply Controller */
+#define SAM3U_PID_RSTC (1) /* Reset Controller */
+#define SAM3U_PID_RTC (2) /* Real Time Clock */
+#define SAM3U_PID_RTT (3) /* Real Time Timer */
+#define SAM3U_PID_WDT (4) /* Watchdog Timer */
+#define SAM3U_PID_PMC (5) /* Power Management Controller */
+#define SAM3U_PID_EEFC0 (6) /* Enhanced Embedded Flash Controller 0 */
+#define SAM3U_PID_EEFC1 (7) /* Enhanced Embedded Flash Controller 1 */
+#define SAM3U_PID_UART (8) /* Universal Asynchronous Receiver Transmitter */
+#define SAM3U_PID_SMC (9) /* Static Memory Controller */
+#define SAM3U_PID_PIOA (10) /* Parallel I/O Controller A */
+#define SAM3U_PID_PIOB (11) /* Parallel I/O Controller B */
+#define SAM3U_PID_PIOC (12) /* Parallel I/O Controller C */
+#define SAM3U_PID_USART0 (13) /* USART 0 */
+#define SAM3U_PID_USART1 (14) /* USART 1 */
+#define SAM3U_PID_USART2 (15) /* USART 2 */
+#define SAM3U_PID_USART3 (16) /* USART 3 */
+#define SAM3U_PID_HSMCI (17) /* High Speed Multimedia Card Interface */
+#define SAM3U_PID_TWI0 (18) /* Two-Wire Interface 0 */
+#define SAM3U_PID_TWI1 (19) /* Two-Wire Interface 1 */
+#define SAM3U_PID_SPI (20) /* Serial Peripheral Interface */
+#define SAM3U_PID_SSC (21) /* Synchronous Serial Controller */
+#define SAM3U_PID_TC0 (22) /* Timer Counter 0 */
+#define SAM3U_PID_TC1 (23) /* Timer Counter 1 */
+#define SAM3U_PID_TC2 (24) /* Timer Counter 2 */
+#define SAM3U_PID_PWM (25) /* Pulse Width Modulation Controller */
+#define SAM3U_PID_ADC12B (26) /* 12-bit ADC Controller */
+#define SAM3U_PID_ADC (27) /* 10-bit ADC Controller */
+#define SAM3U_PID_DMAC (28) /* DMA Controller */
+#define SAM3U_PID_UDPHS (29) /* USB Device High Speed */
+#define NR_PIDS (30) /* Number of peripheral identifiers */
-/****************************************************************************
+/* IRQ numbers. The IRQ number corresponds vector number and hence map directly to
+ * bits in the NVIC. This does, however, waste several words of memory in the IRQ
+ * to handle mapping tables.
+ */
+
+/* Processor Exceptions (vectors 0-15) */
+
+#define SAM3U_IRQ_RESERVED (0) /* Reserved vector (only used with CONFIG_DEBUG) */
+ /* Vector 0: Reset stack pointer value */
+ /* Vector 1: Reset (not handler as an IRQ) */
+#define SAM3U_IRQ_NMI (2) /* Vector 2: Non-Maskable Interrupt (NMI) */
+#define SAM3U_IRQ_HARDFAULT (3) /* Vector 3: Hard fault */
+#define SAM3U_IRQ_MPU (4) /* Vector 4: Memory management (MPU) */
+#define SAM3U_IRQ_BUSFAULT (5) /* Vector 5: Bus fault */
+#define SAM3U_IRQ_USAGEFAULT (6) /* Vector 6: Usage fault */
+#define SAM3U_IRQ_SVCALL (11) /* Vector 11: SVC call */
+#define SAM3U_IRQ_DBGMONITOR (12) /* Vector 12: Debug Monitor */
+ /* Vector 13: Reserved */
+#define SAM3U_IRQ_PENDSV (14) /* Vector 14: Pendable system service request */
+#define SAM3U_IRQ_SYSTICK (15) /* Vector 15: System tick */
+
+/* External interrupts (vectors >= 16) */
+
+#define SAM3U_IRQ_EXTINT (16)
+#define SAM3U_IRQ_SUPC (SAM3U_IRQ_EXTINT+SAM3U_PID_SUPC) /* Supply Controller */
+#define SAM3U_IRQ_RSTC (SAM3U_IRQ_EXTINT+SAM3U_PID_RSTC) /* Reset Controller */
+#define SAM3U_IRQ_RTC (SAM3U_IRQ_EXTINT+SAM3U_PID_RTC) /* Real Time Clock */
+#define SAM3U_IRQ_RTT (SAM3U_IRQ_EXTINT+SAM3U_PID_RTT) /* Real Time Timer */
+#define SAM3U_IRQ_WDT (SAM3U_IRQ_EXTINT+SAM3U_PID_WDT) /* Watchdog Timer */
+#define SAM3U_IRQ_PMC (SAM3U_IRQ_EXTINT+SAM3U_PID_PMC) /* Power Management Controller */
+#define SAM3U_IRQ_EEFC0 (SAM3U_IRQ_EXTINT+SAM3U_PID_EEFC0) /* Enhanced Embedded Flash Controller 0 */
+#define SAM3U_IRQ_EEFC1 (SAM3U_IRQ_EXTINT+SAM3U_PID_EEFC1) /* Enhanced Embedded Flash Controller 1 */
+#define SAM3U_IRQ_UART (SAM3U_IRQ_EXTINT+SAM3U_PID_UART) /* Universal Asynchronous Receiver Transmitter */
+#define SAM3U_IRQ_SMC (SAM3U_IRQ_EXTINT+SAM3U_PID_SMC) /* Static Memory Controller */
+#define SAM3U_IRQ_PIOA (SAM3U_IRQ_EXTINT+SAM3U_PID_PIOA) /* Parallel I/O Controller A */
+#define SAM3U_IRQ_PIOB (SAM3U_IRQ_EXTINT+SAM3U_PID_PIOB) /* Parallel I/O Controller B */
+#define SAM3U_IRQ_PIOC (SAM3U_IRQ_EXTINT+SAM3U_PID_PIOC) /* Parallel I/O Controller C */
+#define SAM3U_IRQ_USART0 (SAM3U_IRQ_EXTINT+SAM3U_PID_USART0) /* USART 0 */
+#define SAM3U_IRQ_USART1 (SAM3U_IRQ_EXTINT+SAM3U_PID_USART1) /* USART 1 */
+#define SAM3U_IRQ_USART2 (SAM3U_IRQ_EXTINT+SAM3U_PID_USART2) /* USART 2 */
+#define SAM3U_IRQ_USART3 (SAM3U_IRQ_EXTINT+SAM3U_PID_USART3) /* USART 3 */
+#define SAM3U_IRQ_HSMCI (SAM3U_IRQ_EXTINT+SAM3U_PID_HSMCI) /* High Speed Multimedia Card Interface */
+#define SAM3U_IRQ_TWI0 (SAM3U_IRQ_EXTINT+SAM3U_PID_TWI0) /* Two-Wire Interface 0 */
+#define SAM3U_IRQ_TWI1 (SAM3U_IRQ_EXTINT+SAM3U_PID_TWI1) /* Two-Wire Interface 1 */
+#define SAM3U_IRQ_SPI (SAM3U_IRQ_EXTINT+SAM3U_PID_SPI) /* Serial Peripheral Interface */
+#define SAM3U_IRQ_SSC (SAM3U_IRQ_EXTINT+SAM3U_PID_SSC) /* Synchronous Serial Controller */
+#define SAM3U_IRQ_TC0 (SAM3U_IRQ_EXTINT+SAM3U_PID_TC0) /* Timer Counter 0 */
+#define SAM3U_IRQ_TC1 (SAM3U_IRQ_EXTINT+SAM3U_PID_TC1) /* Timer Counter 1 */
+#define SAM3U_IRQ_TC2 (SAM3U_IRQ_EXTINT+SAM3U_PID_TC2) /* Timer Counter 2 */
+#define SAM3U_IRQ_PWM (SAM3U_IRQ_EXTINT+SAM3U_PID_PWM) /* Pulse Width Modulation Controller */
+#define SAM3U_IRQ_ADC12B (SAM3U_IRQ_EXTINT+SAM3U_PID_ADC12B) /* 12-bit ADC Controller */
+#define SAM3U_IRQ_ADC (SAM3U_IRQ_EXTINT+SAM3U_PID_ADC) /* 10-bit ADC Controller */
+#define SAM3U_IRQ_DMAC (SAM3U_IRQ_EXTINT+SAM3U_PID_DMAC) /* DMA Controller */
+#define SAM3U_IRQ_UDPHS (SAM3U_IRQ_EXTINT+SAM3U_PID_UDPHS) /* USB Device High Speed */
+#define NR_IRQS (SAM3U_IRQ_EXTINT+NR_PIDS) /* Total number of IRQ numbers */
+
+/****************************************************************************************
* Public Types
- ****************************************************************************/
+ ****************************************************************************************/
-/****************************************************************************
+/****************************************************************************************
* Inline functions
- ****************************************************************************/
+ ****************************************************************************************/
-/****************************************************************************
+/****************************************************************************************
* Public Variables
- ****************************************************************************/
+ ****************************************************************************************/
-/****************************************************************************
+/****************************************************************************************
* Public Function Prototypes
- ****************************************************************************/
+ ****************************************************************************************/
#ifndef __ASSEMBLY__
#ifdef __cplusplus
diff --git a/arch/arm/src/sam3u/Make.defs b/arch/arm/src/sam3u/Make.defs
index 92891b6681..9f95226671 100755
--- a/arch/arm/src/sam3u/Make.defs
+++ b/arch/arm/src/sam3u/Make.defs
@@ -33,7 +33,7 @@
#
############################################################################
-HEAD_ASRC =
+HEAD_ASRC = sam3u_vectors.S
CMN_ASRCS = up_saveusercontext.S up_fullcontextrestore.S up_switchcontext.S
CMN_CSRCS = up_allocateheap.c up_assert.c up_blocktask.c up_copystate.c \
diff --git a/arch/arm/src/sam3u/sam3u_memorymap.h b/arch/arm/src/sam3u/sam3u_memorymap.h
index 0bca62cf1d..801c4d258c 100755
--- a/arch/arm/src/sam3u/sam3u_memorymap.h
+++ b/arch/arm/src/sam3u/sam3u_memorymap.h
@@ -56,30 +56,30 @@
#define SAM3U_INTSRAM_BASE 0x20000000 /* 0x20000000-0x3fffffff: Internal SRAM */
# define SAM3U_INTSRAM0_BASE 0x20000000 /* 0x20000000-0x2007ffff: SRAM0 */
# define SAM3U_INTSRAM1_BASE 0x20080000 /* 0x20080000-0x200fffff: SRAM1 */
-# define SAM3U_NFCSRAM_BASE 0x20100000 /* 0x20100000-0x207fffff: NFC (SRAM) */
-# define SAM3U_UDPHPSDMS_BASE 0x20180000 /* 0x20180000-0x201fffff: UDPHS (DMA) */
+# define SAM3U_NFCSRAM_BASE 0x20100000 /* 0x20100000-0x207fffff: NAND FLASH controller (SRAM) */
+# define SAM3U_UDPHPSDMS_BASE 0x20180000 /* 0x20180000-0x201fffff: USB Device High Speed (DMA) */
/* 0x20200000-0x2fffffff: Undefined */
# define SAM3U_BBSRAM_BASE 0x22000000 /* 0x22000000-0x23ffffff: 32Mb bit-band alias */
/* 0x24000000-0x3fffffff: Undefined */
#define SAM3U_PERIPHERALS_BASE 0x40000000 /* 0x40000000-0x5fffffff: Peripherals */
-# define SAM3U_MCI_BASE 0x40000000 /* 0x40000000-0x400003ff: MCI */
-# define SAM3U_SSC_BASE 0x40000400 /* 0x40000400-0x400007ff: SSC */
-# define SAM3U_SPI_BASE 0x40000800 /* 0x40000800-0x40000bff: SPI */
+# define SAM3U_MCI_BASE 0x40000000 /* 0x40000000-0x400003ff: High Speed Multimedia Card Interface */
+# define SAM3U_SSC_BASE 0x40000400 /* 0x40000400-0x400007ff: Synchronous Serial Controller */
+# define SAM3U_SPI_BASE 0x40000800 /* 0x40000800-0x40000bff: Serial Peripheral Interface */
/* 0x40000c00-0x4007ffff: Reserved */
-# define SAM3U_TC0_BASE 0x40080000 /* 0x40080000-0x4008003f: TC0 */
-# define SAM3U_TC1_BASE 0x40080040 /* 0x40080040-0x4008007f: TC1 */
-# define SAM3U_TC2_BASE 0x40080080 /* 0x40080080-0x400800bf: TC2 */
-# define SAM3U_TWI0_BASE 0x40084000 /* 0x40084000-0x40087fff: TWI0 */
-# define SAM3U_TWI1_BASE 0x40088000 /* 0x40088000-0x4008bfff: TWI1 */
-# define SAM3U_PWM_BASE 0x4008c000 /* 0x4008c000-0x4008ffff: PWM */
+# define SAM3U_TC0_BASE 0x40080000 /* 0x40080000-0x4008003f: Timer Counter 0 */
+# define SAM3U_TC1_BASE 0x40080040 /* 0x40080040-0x4008007f: Timer Counter 1 */
+# define SAM3U_TC2_BASE 0x40080080 /* 0x40080080-0x400800bf: Timer Counter 2 */
+# define SAM3U_TWI0_BASE 0x40084000 /* 0x40084000-0x40087fff: Two-Wire Interface 0 */
+# define SAM3U_TWI1_BASE 0x40088000 /* 0x40088000-0x4008bfff: Two-Wire Interface 1 */
+# define SAM3U_PWM_BASE 0x4008c000 /* 0x4008c000-0x4008ffff: Pulse Width Modulation Controller */
# define SAM3U_USART0_BASE 0x40090000 /* 0x40090000-0x40093fff: USART0 */
# define SAM3U_USART1_BASE 0x40094000 /* 0x40094000-0x40097fff: USART1 */
# define SAM3U_USART2_BASE 0x40098000 /* 0x40098000-0x4009bfff: USART2 */
# define SAM3U_USART3_BASE 0x4009c000 /* 0x4009c000-0x4009ffff: USART3 */
/* 0x400a0000-0x400a3fff: Reserved */
-# define SAM3U_UDPHPS_BASE 0x400a4000 /* 0x400a4000-0x400a7fff: UDPHS */
-# define SAM3U_ADC12B_BASE 0x400a8000 /* 0x400a8000-0x400abfff: ADC 12-bit */
-# define SAM3U_ADC_BASE 0x400ac000 /* 0x400ac000-0x400affff: ADC */
+# define SAM3U_UDPHPS_BASE 0x400a4000 /* 0x400a4000-0x400a7fff: USB Device High Speed */
+# define SAM3U_ADC12B_BASE 0x400a8000 /* 0x400a8000-0x400abfff: 12-bit ADC Controller */
+# define SAM3U_ADC_BASE 0x400ac000 /* 0x400ac000-0x400affff: 10-bit ADC Controller */
# define SAM3U_DMAC_BASE 0x400b0000 /* 0x400b0000-0x400b3fff: DMA controller */
/* 0x400b4000-0x400dffff: Reserved */
# define SAM3U_SYSCTRLR_BASE 0x400e0000 /* 0x400e0000-0x400e25ff: System controller */
@@ -93,28 +93,28 @@
# define SAM3U_EXTCS2_BASE 0x62000000 /* 0x62000000-0x62ffffff: Chip select 2 */
# define SAM3U_EXTCS3_BASE 0x63000000 /* 0x63000000-0x63ffffff: Chip select 3 */
/* 0x64000000-0x67ffffff: Reserved */
-# define SAM3U_NFC_BASE 0x68000000 /* 0x68000000-0x68ffffff: NFC */
+# define SAM3U_NFC_BASE 0x68000000 /* 0x68000000-0x68ffffff: NAND FLASH controller */
/* 0x69000000-0x9fffffff: Reserved */
/* 0xa0000000-0xdfffffff: Reserved */
#define SAM3U_SYSTEM_BASE 0xe0000000 /* 0xe0000000-0xffffffff: System */
/* System Controller Register Blocks: 0x400e0000-0x4007ffff */
-#define SAM3U_SMC_BASE 0x400e0000 /* 0x400e0000-0x400e01ff: SMC */
+#define SAM3U_SMC_BASE 0x400e0000 /* 0x400e0000-0x400e01ff: Static Memory Controller */
#define SAM3U_MATRIX_BASE 0x400e0000 /* 0x400e0200-0x400e03ff: MATRIX */
-#define SAM3U_PMC_BASE 0x400e0000 /* 0x400e0400-0x400e05ff: PMC */
+#define SAM3U_PMC_BASE 0x400e0000 /* 0x400e0400-0x400e05ff: Power Management Controller */
#define SAM3U_UART_BASE 0x400e0000 /* 0x400e0600-0x400e073f: UART */
#define SAM3U_CHIPID_BASE 0x400e0000 /* 0x400e0740-0x400e07ff: CHIP ID */
-#define SAM3U_EFC0_BASE 0x400e0000 /* 0x400e0800-0x400e09ff: EFC0 */
-#define SAM3U_EFC1_BASE 0x400e0000 /* 0x400e0a00-0x400e0bff: EFC1 */
-#define SAM3U_PIOA_BASE 0x400e0000 /* 0x400e0c00-0x400e0dff: PIOA */
-#define SAM3U_PIOB_BASE 0x400e0000 /* 0x400e0e00-0x400e0fff: PIOB */
-#define SAM3U_PIOC_BASE 0x400e0000 /* 0x400e1000-0x400e11ff: PIOC */
-#define SAM3U_RSTC_BASE 0x400e0000 /* 0x400e1200-0x400e120f: RSTC */
-#define SAM3U_SUPC_BASE 0x400e0000 /* 0x400e1210-0x400e122f: SUPC */
-#define SAM3U_RTT_BASE 0x400e0000 /* 0x400e1230-0x400e124f: RTT */
-#define SAM3U_WDT_BASE 0x400e0000 /* 0x400e1250-0x400e125f: WDT */
-#define SAM3U_RTC_BASE 0x400e0000 /* 0x400e1260-0x400e128f: RTD */
+#define SAM3U_EFC0_BASE 0x400e0000 /* 0x400e0800-0x400e09ff: Enhanced Embedded Flash Controller 0 */
+#define SAM3U_EFC1_BASE 0x400e0000 /* 0x400e0a00-0x400e0bff: Enhanced Embedded Flash Controller 1 */
+#define SAM3U_PIOA_BASE 0x400e0000 /* 0x400e0c00-0x400e0dff: Parallel I/O Controller A */
+#define SAM3U_PIOB_BASE 0x400e0000 /* 0x400e0e00-0x400e0fff: Parallel I/O Controller B */
+#define SAM3U_PIOC_BASE 0x400e0000 /* 0x400e1000-0x400e11ff: Parallel I/O Controller C */
+#define SAM3U_RSTC_BASE 0x400e0000 /* 0x400e1200-0x400e120f: Reset Controller */
+#define SAM3U_SUPC_BASE 0x400e0000 /* 0x400e1210-0x400e122f: Supply Controller */
+#define SAM3U_RTT_BASE 0x400e0000 /* 0x400e1230-0x400e124f: Real Time Timer */
+#define SAM3U_WDT_BASE 0x400e0000 /* 0x400e1250-0x400e125f: Watchdog Timer */
+#define SAM3U_RTC_BASE 0x400e0000 /* 0x400e1260-0x400e128f: Real Time Clock */
#define SAM3U_GPBR_BASE 0x400e0000 /* 0x400e1290-0x400e13ff: GPBR */
/* 0x490e1400-0x4007ffff: Reserved */
diff --git a/arch/arm/src/sam3u/sam3u_vectors.S b/arch/arm/src/sam3u/sam3u_vectors.S
new file mode 100755
index 0000000000..361695ed84
--- /dev/null
+++ b/arch/arm/src/sam3u/sam3u_vectors.S
@@ -0,0 +1,339 @@
+/************************************************************************************************
+ * arch/arm/src/sam3u/sam3u_vectors.S
+ * arch/arm/src/chip/sam3u_vectors.S
+ *
+ * Copyright (C) 2009 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************************************/
+
+/************************************************************************************************
+ * Included Files
+ ************************************************************************************************/
+
+#include <nuttx/config.h>
+#include <arch/irq.h>
+
+/************************************************************************************************
+ * Preprocessor Definitions
+ ************************************************************************************************/
+
+/* Memory Map:
+ *
+ * 0x0800:0000 - Beginning of FLASH. Address of vectors (if not using bootloader)
+ * Mapped to address 0x0000:0000 at boot time.
+ * 0x0800:3000 - Address of vectors if using bootloader
+ * 0x0803:ffff - End of flash
+ * 0x2000:0000 - Start of SRAM and start of .data (_sdata)
+ * - End of .data (_edata) abd start of .bss (_sbss)
+ * - End of .bss (_ebss) and bottom of idle stack
+ * - _ebss + CONFIG_IDLETHREAD_STACKSIZE = end of idle stack, start of heap
+ * 0x2000:ffff - End of SRAM and end of heap
+ */
+
+#define IDLE_STACK (_ebss+CONFIG_IDLETHREAD_STACKSIZE-4)
+#define HEAP_BASE (_ebss+CONFIG_IDLETHREAD_STACKSIZE-4)
+
+/* The Cortex-M3 return from interrupt is unusual. We provide the following special
+ * address to the BX instruction. The particular value also forces a return to
+ * thread mode and covers state from the main stack point, the MSP (vs. the MSP).
+ */
+
+#define EXC_RETURN 0xfffffff9
+
+/************************************************************************************************
+ * Global Symbols
+ ************************************************************************************************/
+
+ .globl __start
+
+ .syntax unified
+ .thumb
+ .file "sam3u_vectors.S"
+
+/************************************************************************************************
+ * Macros
+ ************************************************************************************************/
+
+/* On entry into an IRQ, the hardware automatically saves the xPSR, PC, LR, R12, R0-R3
+ * registers on the stack, then branches to an instantantiation of the following
+ * macro. This macro simply loads the IRQ number into R0, then jumps to the common
+ * IRQ handling logic.
+ */
+
+ .macro HANDLER, label, irqno
+ .thumb_func
+\label:
+ mov r0, #\irqno
+ b sam3u_common
+ .endm
+
+/************************************************************************************************
+ * Vectors
+ ************************************************************************************************/
+
+ .section .vectors, "ax"
+ .code 16
+ .align 2
+ .globl sam3u_vectors
+ .type sam3u_vectors, function
+
+sam3u_vectors:
+
+/* Processor Exceptions */
+
+ .word IDLE_STACK /* Vector 0: Reset stack pointer */
+ .word __start /* Vector 1: Reset vector */
+ .word sam3u_nmi /* Vector 2: Non-Maskable Interrupt (NMI) */
+ .word sam3u_hardfault /* Vector 3: Hard fault */
+ .word sam3u_mpu /* Vector 4: Memory management (MPU) */
+ .word sam3u_busfault /* Vector 5: Bus fault */
+ .word sam3u_usagefault /* Vector 6: Usage fault */
+ .word sam3u_reserved /* Vector 7: Reserved */
+ .word sam3u_reserved /* Vector 8: Reserved */
+ .word sam3u_reserved /* Vector 9: Reserved */
+ .word sam3u_reserved /* Vector 10: Reserved */
+ .word sam3u_svcall /* Vector 11: SVC call */
+ .word sam3u_dbgmonitor /* Vector 12: Debug monitor */
+ .word sam3u_reserved /* Vector 13: Reserved */
+ .word sam3u_pendsv /* Vector 14: Pendable system service request */
+ .word sam3u_systick /* Vector 15: System tick */
+
+/* External Interrupts */
+
+ .word sam3u_supc /* Vector 16+0: Supply Controller */
+ .word sam3u_rstc /* Vector 16+1: Reset Controller */
+ .word sam3u_rtc /* Vector 16+2: Real Time Clock */
+ .word sam3u_rtt /* Vector 16+3: Real Time Timer */
+ .word sam3u_wdt /* Vector 16+4: Watchdog Timer */
+ .word sam3u_pmc /* Vector 16+5: Power Management Controller */
+ .word sam3u_eefc0 /* Vector 16+6: Enhanced Embedded Flash Controller 0 */
+ .word sam3u_eefc1 /* Vector 16+7: Enhanced Embedded Flash Controller 1 */
+ .word sam3u_uart /* Vector 16+8: Universal Asynchronous Receiver Transmitter */
+ .word sam3u_smc /* Vector 16+9: Static Memory Controller */
+ .word sam3u_pioa /* Vector 16+10: Parallel I/O Controller A */
+ .word sam3u_piob /* Vector 16+11: Parallel I/O Controller B */
+ .word sam3u_pioc /* Vector 16+12: Parallel I/O Controller C */
+ .word sam3u_usart0 /* Vector 16+13: USART 0 */
+ .word sam3u_usart1 /* Vector 16+14: USART 1 */
+ .word sam3u_usart2 /* Vector 16+15: USART 2 */
+ .word sam3u_usart3 /* Vector 16+16: USART 3 */
+ .word sam3u_hsmci /* Vector 16+17: High Speed Multimedia Card Interface */
+ .word sam3u_twi0 /* Vector 16+18: Two-Wire Interface 0 */
+ .word sam3u_twi1 /* Vector 16+19: Two-Wire Interface 1 */
+ .word sam3u_spi /* Vector 16+20: Serial Peripheral Interface */
+ .word sam3u_ssc /* Vector 16+21: Synchronous Serial Controller */
+ .word sam3u_tc0 /* Vector 16+22: Timer Counter 0 */
+ .word sam3u_tc1 /* Vector 16+23: Timer Counter 1 */
+ .word sam3u_tc2 /* Vector 16+24: Timer Counter 2 */
+ .word sam3u_pwm /* Vector 16+25: Pulse Width Modulation Controller */
+ .word sam3u_adc12b /* Vector 16+26: 12-bit ADC Controller */
+ .word sam3u_adc /* Vector 16+27: 10-bit ADC Controller */
+ .word sam3u_dmac /* Vector 16+28: DMA Controller */
+ .word sam3u_udphs /* Vector 16+29: USB Device High Speed */
+ .size sam3u_vectors, .-sam3u_vectors
+
+/************************************************************************************************
+ * .text
+ ************************************************************************************************/
+
+ .text
+ .type handlers, function
+ .thumb_func
+handlers:
+ HANDLER sam3u_reserved, SAM3U_IRQ_RESERVED /* Unexpected/reserved vector */
+ HANDLER sam3u_nmi, SAM3U_IRQ_NMI /* Vector 2: Non-Maskable Interrupt (NMI) */
+ HANDLER sam3u_hardfault, SAM3U_IRQ_HARDFAULT /* Vector 3: Hard fault */
+ HANDLER sam3u_mpu, SAM3U_IRQ_MPU /* Vector 4: Memory management (MPU) */
+ HANDLER sam3u_busfault, SAM3U_IRQ_BUSFAULT /* Vector 5: Bus fault */
+ HANDLER sam3u_usagefault, SAM3U_IRQ_USAGEFAULT /* Vector 6: Usage fault */
+ HANDLER sam3u_svcall, SAM3U_IRQ_SVCALL /* Vector 11: SVC call */
+ HANDLER sam3u_dbgmonitor, SAM3U_IRQ_DBGMONITOR /* Vector 12: Debug Monitor */
+ HANDLER sam3u_pendsv, SAM3U_IRQ_PENDSV /* Vector 14: Penable system service request */
+ HANDLER sam3u_systick, SAM3U_IRQ_SYSTICK /* Vector 15: System tick */
+
+ HANDLER sam3u_supc, SAM3U_IRQ_SUPC /* Vector 16+0: Supply Controller */
+ HANDLER sam3u_rstc, SAM3U_IRQ_RSTC /* Vector 16+1: Reset Controller */
+ HANDLER sam3u_rtc, SAM3U_IRQ_RTC /* Vector 16+2: Real Time Clock */
+ HANDLER sam3u_rtt, SAM3U_IRQ_RTT /* Vector 16+3: Real Time Timer */
+ HANDLER sam3u_wdt, SAM3U_IRQ_WDT /* Vector 16+4: Watchdog Timer */
+ HANDLER sam3u_pmc, SAM3U_IRQ_PMC /* Vector 16+5: Power Management Controller */
+ HANDLER sam3u_eefc0, SAM3U_IRQ_EEFC0 /* Vector 16+6: Enhanced Embedded Flash Controller 0 */
+ HANDLER sam3u_eefc1, SAM3U_IRQ_EEFC1 /* Vector 16+7: Enhanced Embedded Flash Controller 1 */
+ HANDLER sam3u_uart, SAM3U_IRQ_UART /* Vector 16+8: Universal Asynchronous Receiver Transmitter */
+ HANDLER sam3u_smc, SAM3U_IRQ_SMC /* Vector 16+9: Static Memory Controller */
+ HANDLER sam3u_pioa, SAM3U_IRQ_PIOA /* Vector 16+10: Parallel I/O Controller A */
+ HANDLER sam3u_piob, SAM3U_IRQ_PIOB /* Vector 16+11: Parallel I/O Controller B */
+ HANDLER sam3u_pioc, SAM3U_IRQ_PIOC /* Vector 16+12: Parallel I/O Controller C */
+ HANDLER sam3u_usart0, SAM3U_IRQ_USART0 /* Vector 16+13: USART 0 */
+ HANDLER sam3u_usart1, SAM3U_IRQ_USART1 /* Vector 16+14: USART 1 */
+ HANDLER sam3u_usart2, SAM3U_IRQ_USART2 /* Vector 16+15: USART 2 */
+ HANDLER sam3u_usart3, SAM3U_IRQ_USART3 /* Vector 16+16: USART 3 */
+ HANDLER sam3u_hsmci, SAM3U_IRQ_HSMCI /* Vector 16+17: High Speed Multimedia Card Interface */
+ HANDLER sam3u_twi0, SAM3U_IRQ_TWI0 /* Vector 16+18: Two-Wire Interface 0 */
+ HANDLER sam3u_twi1, SAM3U_IRQ_TWI1 /* Vector 16+19: Two-Wire Interface 1 */
+ HANDLER sam3u_spi, SAM3U_IRQ_SPI /* Vector 16+20: Serial Peripheral Interface */
+ HANDLER sam3u_ssc, SAM3U_IRQ_SSC /* Vector 16+21: Synchronous Serial Controller */
+ HANDLER sam3u_tc0, SAM3U_IRQ_TC0 /* Vector 16+22: Timer Counter 0 */
+ HANDLER sam3u_tc1, SAM3U_IRQ_TC1 /* Vector 16+23: Timer Counter 1 */
+ HANDLER sam3u_tc2, SAM3U_IRQ_TC2 /* Vector 16+24: Timer Counter 2 */
+ HANDLER sam3u_pwm, SAM3U_IRQ_PWM /* Vector 16+25: Pulse Width Modulation Controller */
+ HANDLER sam3u_adc12b, SAM3U_IRQ_ADC12B /* Vector 16+26: 12-bit ADC Controller */
+ HANDLER sam3u_adc, SAM3U_IRQ_ADC /* Vector 16+27: 10-bit ADC Controller */
+ HANDLER sam3u_dmac, SAM3U_IRQ_DMAC /* Vector 16+28: DMA Controller */
+ HANDLER sam3u_udphs, SAM3U_IRQ_UDPHS /* Vector 16+29: USB Device High Speed */
+
+/* Common IRQ handling logic. On entry here, the stack is like the following:
+ *
+ * REG_XPSR
+ * REG_R15
+ * REG_R14
+ * REG_R12
+ * REG_R3
+ * REG_R2
+ * REG_R1
+ * MSP->REG_R0
+ *
+ * and R0 contains the IRQ number
+ */
+
+sam3u_common:
+
+ /* Complete the context save */
+
+ mrs r1, msp /* R1=The main stack pointer */
+ mov r2, r1 /* R2=Copy of the main stack pointer */
+ add r2, #HW_XCPT_SIZE /* R2=MSP before the interrupt was taken */
+ mrs r3, primask /* R3=Current PRIMASK setting */
+ stmdb r1!, {r2-r11} /* Save the remaining registers plus the SP value */
+
+ /* Disable interrupts, select the stack to use for interrupt handling
+ * and call up_doirq to handle the interrupt
+ */
+
+ cpsid i /* Disable further interrupts */
+
+ /* If CONFIG_ARCH_INTERRUPTSTACK is defined, we will use a special interrupt
+ * stack pointer. The way that this is done here prohibits nested interrupts!
+ * Otherwise, we will re-use the main stack for interrupt level processing.
+ */
+
+#ifdef CONFIG_ARCH_INTERRUPTSTACK
+ ld sp, #up_interruptstack_base
+ str r1, [sp, #-4]! /* Save the MSP on the interrupt stack */
+ bl up_doirq /* R0=IRQ, R1=register save (msp) */
+ ldr r1, [sp, #+4]! /* Recover R1=main stack pointer */
+#else
+ mov sp, r1 /* We are using the main stack pointer */
+ bl up_doirq /* R0=IRQ, R1=register save (msp) */
+ mov r1, sp /* Recover R1=main stack pointer */
+#endif
+
+ /* On return from up_doirq, R0 will hold a pointer to register context
+ * array to use for the interrupt return. If that return value is the same
+ * as current stack pointer, then things are relatively easy.
+ */
+
+ cmp r0, r1 /* Context switch? */
+ beq 1f /* Branch if no context switch */
+
+ /* We are returning with a pending context switch. This case is different
+ * because in this case, the register save structure does not lie on the
+ * stack but, rather, are within a TCB structure. We'll have to copy some
+ * values to the stack.
+ */
+
+ add r1, r0, #SW_XCPT_SIZE /* R1=Address of HW save area in reg array */
+ ldmia r1, {r4-r11} /* Fetch eight registers in HW save area */
+ ldr r1, [r0, #(4*REG_SP)] /* R1=Value of SP before interrupt */
+ stmdb r1!, {r4-r11} /* Store eight registers in HW save area */
+ ldmia r0, {r2-r11} /* Recover R4-R11 + 2 temp values */
+ b 2f /* Re-join common logic */
+
+ /* We are returning with no context switch. We simply need to "unwind"
+ * the same stack frame that we created
+ */
+1:
+ ldmia r1!, {r2-r11} /* Recover R4-R11 + 2 temp values */
+2:
+ msr msp, r1 /* Recover the return MSP value */
+
+ /* Do we need to restore interrupts? */
+
+ tst r3, #1 /* PRIMASK bit 1=1 means that interrupts are masked */
+ bne 3f
+ cpsie i /* Restore interrupts */
+
+ /* Always return with R14 containing the special value that will: (1)
+ * return to thread mode, and (2) continue to use the MSP
+ */
+3:
+ ldr r14, =EXC_RETURN /* Load the special value */
+ bx r14 /* And return */
+ .size handlers, .-handlers
+
+/************************************************************************************************
+ * Name: up_interruptstack/g_userstack
+ *
+ * Description:
+ * Shouldn't happen
+ *
+ ************************************************************************************************/
+
+#if CONFIG_ARCH_INTERRUPTSTACK > 3
+ .bss
+ .align 4
+up_interruptstack:
+ .skip (CONFIG_ARCH_INTERRUPTSTACK & ~3)
+up_interruptstack_base:
+ .size up_interruptstack, .-up_interruptstack
+#endif
+
+/************************************************************************************************
+ * .rodata
+ ************************************************************************************************/
+
+ .section .rodata, "a"
+
+/* Variables: _sbss is the start of the BSS region (see ld.script) _ebss is the end
+ * of the BSS regsion (see ld.script). The idle task stack starts at the end of BSS
+ * and is of size CONFIG_IDLETHREAD_STACKSIZE. The IDLE thread is the thread that
+ * the system boots on and, eventually, becomes the idle, do nothing task that runs
+ * only when there is nothing else to run. The heap continues from there until the
+ * end of memory. See g_heapbase below.
+ */
+
+ .globl g_heapbase
+ .type g_heapbase, object
+g_heapbase:
+ .long _ebss+CONFIG_IDLETHREAD_STACKSIZE
+ .size g_heapbase, .-g_heapbase
+
+ .end
--
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