[vmm] add realview-pb-a8 VMM support

bsp/realview-a8/.gitignore

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+# Object files
+*.o
+*.bin
+*.pyc
+*.map
+*.elf
+
+# Libraries
+*.lib
+*.a
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+
+.scons*
+
+# directory
+build/*

bsp/realview-a8/README.md

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+VMM BSP on realview-pb-a8
+
+This is a demo program that run RT-Thread VMM(Virtual Machine Module) on
+the single core RealView-PB-A8.
+
+To compile it, you need buildroot and a linux 3.8.x source tree. You should
+build the patched Linux kernel and builroot before building the VMM. This
+directory has a "mk.sh" helper script to build both the RT-Thread, Linux kernel
+module and the ramdisk.
+
+Linux console is serial0 and RT-Thread console is serial1.

bsp/realview-a8/SConscript

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+# for module compiling
+import os
+Import('RTT_ROOT')
+
+cwd = str(Dir('#'))
+objs = []
+list = os.listdir(cwd)
+
+for d in list:
+    path = os.path.join(cwd, d)
+    if os.path.isfile(os.path.join(path, 'SConscript')):
+        objs = objs + SConscript(os.path.join(d, 'SConscript'))
+
+Return('objs')

bsp/realview-a8/SConstruct

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+import os
+import sys
+import rtconfig
+
+if os.getenv('RTT_ROOT'):
+    RTT_ROOT = os.getenv('RTT_ROOT')
+else:
+    RTT_ROOT = os.path.normpath(os.getcwd() + '/../..')
+
+sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
+from building import *
+
+TARGET = 'rtthread-realview.' + rtconfig.TARGET_EXT
+
+env = Environment(tools = ['mingw'],
+	AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
+	CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
+	AR = rtconfig.AR, ARFLAGS = '-rc',
+	LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
+env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
+
+Export('RTT_ROOT')
+Export('rtconfig')
+
+# prepare building environment
+objs = PrepareBuilding(env, RTT_ROOT)
+
+if GetDepend('RT_USING_VMM'):
+    if os.system('{cppcmd} -P -C -E -I. -D__ASSEMBLY__ {ldfile}.S -o {ldfile}'.format(
+                  cppcmd = os.path.join(rtconfig.EXEC_PATH, 'arm-none-eabi-gcc'),
+                  ldfile = rtconfig.LINK_SCRIPT)) != 0:
+        print 'failed to generate linker script %s' % rtconfig.LINK_SCRIPT
+        sys.exit(255)
+# if the linker script changed, relink the target
+Depends(TARGET, rtconfig.LINK_SCRIPT)
+
+# make a building
+DoBuilding(TARGET, objs)

bsp/realview-a8/applications/SConscript

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+Import('RTT_ROOT')
+Import('rtconfig')
+from building import *
+
+cwd     = os.path.join(str(Dir('#')), 'applications')
+src	= Glob('*.c')
+CPPPATH = [cwd, str(Dir('#'))]
+
+group = DefineGroup('Applications', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')

bsp/realview-a8/applications/application.c

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+/*
+ * File      : application.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2012, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2012-11-20     Bernard    the first version
+ */
+
+#include <rtthread.h>
+#include <components.h>
+
+#include <pthread.h>
+
+void *test_task(void *parameter)
+{
+    int count = 0;
+
+    while (1)
+    {
+        rt_thread_delay(RT_TICK_PER_SECOND);
+        rt_kprintf("count = %d\n", count ++);
+    }
+
+    return RT_NULL;
+}
+
+int rt_application_init()
+{
+    // pthread_t tid;
+
+    /* do component initialization */
+    rt_components_init();
+#ifdef RT_USING_NEWLIB
+    libc_system_init(RT_CONSOLE_DEVICE_NAME);
+#endif
+
+    // pthread_create(&tid, RT_NULL, test_task, RT_NULL);
+
+    return 0;
+}
+

bsp/realview-a8/applications/startup.c

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+/*
+ * File      : startup.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006, RT-Thread Develop Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2012-12-05     Bernard      the first version
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+
+#include <board.h>
+
+extern int  rt_application_init(void);
+extern void rt_hw_board_init(void);
+
+/**
+ * This function will startup RT-Thread RTOS.
+ */
+void rtthread_startup(void)
+{
+    /* initialzie hardware interrupt */
+    rt_hw_interrupt_init();
+
+    /* initialize board */
+    rt_hw_board_init();
+
+    /* show RT-Thread version */
+    rt_show_version();
+
+    /* initialize memory system */
+#ifdef RT_USING_HEAP
+    rt_system_heap_init(HEAP_BEGIN, HEAP_END);
+#endif
+
+    /* initialize scheduler system */
+    rt_system_scheduler_init();
+
+    /* initialize timer and soft timer thread */
+    rt_system_timer_init();
+    rt_system_timer_thread_init();
+
+    /* initialize application */
+    rt_application_init();
+
+    /* initialize idle thread */
+    rt_thread_idle_init();
+
+    /* start scheduler */
+    rt_system_scheduler_start();
+
+    /* never reach here */
+    return ;
+}
+
+int main(void)
+{
+    /* disable interrupt first */
+    rt_hw_interrupt_disable();
+
+    /* invoke rtthread_startup */
+    rtthread_startup();
+
+    return 0;
+}
+

bsp/realview-a8/boot.sh

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+#!/bin/sh -e
+scons -j12
+qemu-system-arm -M realview-pb-a8 -kernel rtthread-realview.elf -serial vc -serial stdio

bsp/realview-a8/drivers/SConscript

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+import copy
+Import('RTT_ROOT')
+Import('rtconfig')
+from building import *
+
+cwd     = GetCurrentDir()
+src	= Glob('*.c')
+
+# remove no need file.
+if GetDepend('RT_USING_LWIP') == False:
+    src_need_remove = ['dm9000.c'] # need remove file list.
+    SrcRemove(src, src_need_remove)
+
+if GetDepend('RT_USING_DFS') == False:
+    src_need_remove = ['sd.c'] # need remove file list.
+    SrcRemove(src, src_need_remove)
+
+CPPPATH = [cwd]
+
+group = DefineGroup('Drivers', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')

bsp/realview-a8/drivers/board.c

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+/*
+ * File      : board.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2012, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2012-11-20     Bernard    the first version
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+#include <components.h>
+
+#include "board.h"
+
+#define TIMER_LOAD(hw_base)              __REG32(hw_base + 0x00)
+#define TIMER_VALUE(hw_base)             __REG32(hw_base + 0x04)
+#define TIMER_CTRL(hw_base)              __REG32(hw_base + 0x08)
+#define TIMER_CTRL_ONESHOT      (1 << 0)
+#define TIMER_CTRL_32BIT        (1 << 1)
+#define TIMER_CTRL_DIV1         (0 << 2)
+#define TIMER_CTRL_DIV16        (1 << 2)
+#define TIMER_CTRL_DIV256       (2 << 2)
+#define TIMER_CTRL_IE           (1 << 5)        /* Interrupt Enable (versatile only) */
+#define TIMER_CTRL_PERIODIC     (1 << 6)
+#define TIMER_CTRL_ENABLE       (1 << 7)
+
+#define TIMER_INTCLR(hw_base)            __REG32(hw_base + 0x0c)
+#define TIMER_RIS(hw_base)               __REG32(hw_base + 0x10)
+#define TIMER_MIS(hw_base)               __REG32(hw_base + 0x14)
+#define TIMER_BGLOAD(hw_base)            __REG32(hw_base + 0x18)
+
+#define SYS_CTRL                         __REG32(REALVIEW_SCTL_BASE)
+
+#ifdef RT_USING_VMM
+ #include <vmm.h>
+ static rt_uint32_t timer_hw_base = 0;
+ #define TIMER_HW_BASE                  (timer_hw_base)
+#else
+ #define TIMER_HW_BASE                  REALVIEW_TIMER2_3_BASE
+#endif
+
+void rt_hw_timer_ack(void)
+{
+    /* clear interrupt */
+    TIMER_INTCLR(TIMER_HW_BASE) = 0x01;
+}
+
+static void rt_hw_timer_isr(int vector, void *param)
+{
+    rt_tick_increase();
+
+    rt_hw_timer_ack();
+}
+
+int rt_hw_timer_init(void)
+{
+    rt_uint32_t val;
+
+#ifdef RT_USING_VMM
+    {
+        rt_uint32_t sys_ctrl;
+        sys_ctrl = vmm_find_iomap("SYS_CTRL");
+        __REG32(sys_ctrl) |= REALVIEW_REFCLK;
+    }
+
+    timer_hw_base = vmm_find_iomap("TIMER");
+#else
+    SYS_CTRL |= REALVIEW_REFCLK;
+#endif
+
+    /* Setup Timer0 for generating irq */
+    val = TIMER_CTRL(TIMER_HW_BASE);
+    val &= ~TIMER_CTRL_ENABLE;
+    val |= (TIMER_CTRL_32BIT | TIMER_CTRL_PERIODIC | TIMER_CTRL_IE);
+    TIMER_CTRL(TIMER_HW_BASE) = val;
+
+    TIMER_LOAD(TIMER_HW_BASE) = 1000;
+
+    /* enable timer */
+    TIMER_CTRL(TIMER_HW_BASE) |= TIMER_CTRL_ENABLE;
+
+    rt_hw_interrupt_install(IRQ_PBA8_TIMER2_3, rt_hw_timer_isr, RT_NULL, "tick");
+    rt_hw_interrupt_umask(IRQ_PBA8_TIMER2_3);
+
+    return 0;
+}
+INIT_BOARD_EXPORT(rt_hw_timer_init);
+
+/**
+ * This function will initialize beaglebone board
+ */
+void rt_hw_board_init(void)
+{
+    rt_components_board_init();
+    rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
+}
+
+/*@}*/

bsp/realview-a8/drivers/board.h

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+/*
+ * File      : board.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2013, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-07-06     Bernard    the first version
+ */
+
+#ifndef __BOARD_H__
+#define __BOARD_H__
+
+#include <realview.h>
+
+#if defined(__CC_ARM)
+extern int Image$$RW_IRAM1$$ZI$$Limit;
+#define HEAP_BEGIN      ((void*)&Image$$RW_IRAM1$$ZI$$Limit)
+#elif defined(__GNUC__)
+extern int __bss_end;
+#define HEAP_BEGIN      ((void*)&__bss_end)
+#endif
+
+#define HEAP_END        (void*)(0x70000000 + 8 * 1024 * 1024)
+
+void rt_hw_board_init(void);
+
+#endif