import RT-Thread@9217865c without bsp, libcpu and components/net

components/vmm/SConscript

@@ -0,0 +1,15 @@
+# RT-Thread building script for component
+
+from building import *
+
+cwd = GetCurrentDir()
+src = Glob('*.c')
+src += Glob('utilities/rshell.c')
+if GetDepend('RT_USING_VMM_RFS'):
+    src += Glob('utilities/rfs.c')
+
+CPPPATH = [cwd, os.path.join(cwd, 'share_hdr')]
+
+group = DefineGroup('VMM', src, depend = ['RT_USING_VMM'], CPPPATH = CPPPATH)
+
+Return('group')

components/vmm/linux_patch-v3.8/0002-arm-gic-correct-the-cpu-map-on-gic_raise_softirq-for.patch

@@ -0,0 +1,37 @@
+From 848bdea67f5fc201cd05687f207e5f8f42b0990d Mon Sep 17 00:00:00 2001
+From: Grissiom <chaos.proton@gmail.com>
+Date: Thu, 3 Apr 2014 16:51:58 +0800
+Subject: [PATCH 2/2] arm: gic: correct the cpu map on gic_raise_softirq for UP
+ system
+
+The CPU mask on UP system is empty, so if we want to raise softirq on UP
+system, designate CPU0 to the map.
+
+Maybe the more correct way is to fix the gic_get_cpumask.
+
+Signed-off-by: Grissiom <chaos.proton@gmail.com>
+---
+ arch/arm/common/gic.c | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
+index a9d7357..5da382b 100644
+--- a/arch/arm/common/gic.c
++++ b/arch/arm/common/gic.c
+@@ -858,6 +858,13 @@ void gic_raise_softirq(const struct cpumask *mask, unsigned int irq)
+ 	 */
+ 	dsb();
+ 
++	/*
++	 * On UP system, realview-pb-a8 for example, the CPU mask is empty. The
++	 * softirq are always handled on CPU0.
++	 */
++	if (map == 0) {
++		map = 1;
++	}
+ 	/* this always happens on GIC0 */
+ 	writel_relaxed(map << 16 | irq, gic_data_dist_base(&gic_data[0]) + GIC_DIST_SOFTINT);
+ }
+-- 
+1.8.4
+

components/vmm/vmm.c

@@ -0,0 +1,172 @@
+/*
+ *  VMM startup file.
+ *
+ * COPYRIGHT (C) 2011-2021, Real-Thread Information Technology Ltd
+ * All rights reserved
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-06-15     Bernard      the first verion
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+
+#include "board.h"
+
+#include "vmm.h"
+#include "vmm_context.h"
+
+extern void rt_hw_interrupt_init(void);
+extern void rt_application_init(void);
+
+void vmm_entry(struct vmm_entry_param* param) rt_section(".vmm_init");
+
+struct rt_thread vmm_thread rt_section(".bss.share.vmm");
+extern rt_uint8_t vmm_stack_start;
+extern rt_uint8_t vmm_stack_end;
+
+void vmm_thread_init(struct rt_thread *thread, const char *name)
+{
+    extern struct rt_thread *rt_current_thread;
+
+    rt_thread_init(thread, name, RT_NULL, RT_NULL,
+                   &vmm_stack_start, &vmm_stack_end - &vmm_stack_start,
+                   RT_THREAD_PRIORITY_MAX - 1, 10);
+
+    /* set thread to ready status but not switch to */
+    rt_thread_startup(thread);
+
+    /* set current thread as vmm thread */
+    rt_current_thread = thread;
+}
+
+#ifdef VMM_VERIFY_GUEST
+static void _verify_guest(void *p)
+{
+    while (1)
+    {
+        rt_thread_delay(RT_TICK_PER_SECOND/4);
+        vmm_verify_guest_status(vmm_thread.sp);
+    }
+}
+
+static void vmm_create_monitor(void)
+{
+    rt_thread_t tid;
+
+    tid = rt_thread_create("vmon",
+                           _verify_guest, RT_NULL,
+                           1024, 8, 20);
+    if (tid)
+        rt_thread_startup(tid);
+}
+#endif
+
+#ifdef RT_VMM_USING_DOMAIN
+extern unsigned long guest_domain_val;
+extern unsigned long vmm_domain_val;
+#endif
+
+static void vmm_entry_glue(rt_uint32_t level,
+                           unsigned int vmm_domain,
+                           unsigned int kernel_domain)
+    /* inline would make the section setting meaningless */
+    __attribute__((noinline))
+    rt_section(".vmm_glue");
+static void vmm_entry_glue(rt_uint32_t level,
+                           unsigned int vmm_domain,
+                           unsigned int kernel_domain)
+{
+    rt_schedule();
+
+#ifdef RT_VMM_USING_DOMAIN
+    /* protect us from the guest code, but leave the shared region permission
+     */
+    guest_domain_val &= ~(0x3 << (vmm_domain * 2));
+
+    /* don't touch the guest kernel space */
+    vmm_domain_val &= ~(0x3 << (kernel_domain * 2));
+#endif
+
+    rt_hw_interrupt_enable(level);
+}
+
+void vmm_entry(struct vmm_entry_param *param)
+{
+    rt_base_t level;
+
+    level = rt_hw_interrupt_disable();
+
+    /* set iomap */
+    vmm_iomap_init(param->iomap);
+
+    /* set VMM context address */
+    vmm_context_init(&RT_VMM_SHARE->ctx);
+
+    /* init hardware interrupt */
+    rt_hw_interrupt_init();
+
+    vmm_vector_init();
+
+    /* init board */
+    rt_hw_board_init();
+
+    /* show version */
+    rt_show_version();
+    rt_kprintf("share ctx: %p(%x)\n",
+               &RT_VMM_SHARE->ctx, sizeof(RT_VMM_SHARE->ctx));
+
+    /* init timer system */
+    rt_system_timer_init();
+
+    {
+        rt_uint32_t ttbr;
+        asm volatile ("mrc p15, 0, %0, c2, c0, 0\n"
+                      : "=r"(ttbr));
+        rt_kprintf("Linux TTBR: 0x%08x\n", ttbr);
+        /*
+         *rt_hw_cpu_dump_page_table((void*)((ttbr & (0xffffc000))
+         *                                  - 0x80000000 + 0xC0000000));
+         */
+        /*rt_hw_cpu_dump_page_table((void*)(0xc0004000));*/
+    }
+
+#ifdef RT_VMM_USING_DOMAIN
+    vmm_context_init_domain(param->domain);
+#endif
+
+    rt_kprintf("heap: 0x%p - 0x%p, %dKi bytes\n",
+               (void*)HEAP_BEGIN, (void*)HEAP_END,
+               ((int)HEAP_END - (int)HEAP_BEGIN) / 1024);
+    /* init heap memory system */
+    rt_system_heap_init((void*)HEAP_BEGIN, (void*)HEAP_END);
+
+    /* init scheduler system */
+    rt_system_scheduler_init();
+
+    rt_kprintf("user application init.\n");
+    /* init application */
+    rt_application_init();
+
+#ifdef VMM_VERIFY_GUEST
+    vmm_create_monitor();
+#endif
+
+    rt_system_timer_thread_init();
+
+    vmm_thread_init(&vmm_thread, "vmm");
+
+#ifdef RT_VMM_USING_DOMAIN
+    rt_kprintf("domain protect present\n");
+#endif
+    /* start scheduler */
+    rt_kprintf("do the first scheduling...\n");
+
+    vmm_entry_glue(level,
+                   param->domain->vmm,
+                   param->domain->kernel);
+}
+

components/vmm/vmm.h

@@ -0,0 +1,44 @@
+/*
+ *  VMM startup file.
+ *
+ * COPYRIGHT (C) 2011-2021, Real-Thread Information Technology Ltd
+ * All rights reserved
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-06-15     Bernard      the first verion
+ */
+
+#ifndef __VMM_H__
+#define __VMM_H__
+
+#ifndef __ASSEMBLY__
+#include <stddef.h> // for size_t
+#endif
+
+#define VMM_VERIFY_GUEST
+
+#include <rtt_api.h>
+
+#ifndef __ASSEMBLY__
+
+void vmm_iomap_init(struct vmm_iomap *iomap);
+unsigned long vmm_find_iomap(const char *name);
+unsigned long vmm_find_iomap_by_pa(unsigned long pa);
+
+void vmm_vector_init(void);
+
+/* If the rshell is run, we could not rt_kprintf in some situation because
+ * write to a vbus channel *Would BLOCK*. So we cannot use it in interrupt
+ * context, we cannot use it within the context of idle(vmm). */
+#define vmm_debug(fmt, ...)
+#define vmm_verbose(fmt, ...)
+#define vmm_info(fmt, ...)
+
+#endif
+
+#define ARRAY_SIZE(ar)     (sizeof(ar)/sizeof(ar[0]))
+
+#endif

components/vmm/vmm_context.c

@@ -0,0 +1,317 @@
+/*
+ * COPYRIGHT (C) 2011-2021, Real-Thread Information Technology Ltd
+ * All rights reserved
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-11-04     Grissiom     add comment
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+#include <interrupt.h>
+
+#include <log_trace.h>
+#include <vmm.h>
+
+#include "vmm_context.h"
+
+struct rt_vmm_share_layout rt_vmm_share rt_section(".vmm.share");
+
+volatile struct vmm_context *_vmm_context = RT_NULL;
+
+void vmm_context_init(void *context_addr)
+{
+    _vmm_context = (struct vmm_context *)context_addr;
+    rt_memset((void *)_vmm_context, 0x00, sizeof(struct vmm_context));
+    /* When loading RT-Thread, the IRQ on the guest should be disabled. */
+    _vmm_context->virq_status = 1;
+}
+
+#ifdef RT_VMM_USING_DOMAIN
+unsigned long guest_domain_val rt_section(".bss.share");
+unsigned long vmm_domain_val rt_section(".bss.share");
+/* some RT-Thread code need to be called in the guest
+ * context(rt_thread_idle_excute for example). To simplify the code, we need a
+ * "super" domain mode to have access of both side. The code executed in super
+ * domain mode is restricted and should be harmless. */
+unsigned long super_domain_val rt_section(".bss.share");
+void vmm_context_init_domain(struct vmm_domain *domain)
+{
+    asm volatile ("mrc p15, 0, %0, c3, c0\n" : "=r" (guest_domain_val));
+
+    rt_kprintf("Linux domain: kernel: %d, user: %d, io: %d\n"
+               "VMM domain: vmm: %d, share: %d\n",
+               domain->kernel, domain->user, domain->io,
+               domain->vmm, domain->vmm_share);
+
+    if (domain->kernel == domain->vmm ||
+        domain->io     == domain->vmm)
+    {
+        rt_kprintf("VMM and the guest share the same domain\n");
+        super_domain_val = vmm_domain_val = guest_domain_val;
+        return;
+    }
+
+    vmm_domain_val = guest_domain_val;
+
+    /* become client to our own territory */
+    vmm_domain_val |= (1 << (domain->vmm * 2)) | (1 << (domain->vmm_share * 2));
+
+    super_domain_val = vmm_domain_val;
+    /* super domain has access to both side */
+    super_domain_val |= (1 << (domain->kernel * 2)) | (1 << (domain->user * 2));
+
+    rt_kprintf("Original DAC: 0x%08x\n", guest_domain_val);
+}
+
+unsigned long vmm_context_enter_domain(unsigned long domain_val)
+{
+    unsigned long old_domain;
+
+    asm volatile ("mrc p15, 0, %0, c3, c0\n" : "=r" (old_domain));
+    asm volatile ("mcr p15, 0, %0, c3, c0\n" : :"r" (domain_val) : "memory");
+
+    return old_domain;
+}
+
+void vmm_context_restore_domain(unsigned long domain_val)
+{
+    asm volatile ("mcr p15, 0, %0, c3, c0\n" : :"r" (domain_val) : "memory");
+}
+#endif
+
+void vmm_virq_pending(int irq)
+{
+    /* when running this piece of code, the guest is already suspended. So it's
+     * safe to set the bits without locks. */
+    _vmm_context->virq_pending[irq / 32] |= (1 << (irq % 32));
+    _vmm_context->virq_pended = 1;
+    /* mask this IRQ in host */
+    rt_hw_interrupt_mask(irq);
+}
+
+void vmm_virq_update(void)
+{
+    if ((!_vmm_context->virq_status) &&
+        ( _vmm_context->virq_pended))
+    {
+        rt_hw_interrupt_trigger(RT_VMM_VIRQ_TRIGGER);
+    }
+}
+
+/** check the guest IRQ status
+ *
+ * @return 0 on guest should handle IRQ, -1 on should restore the guest context
+ * normally.
+ */
+int vmm_virq_check(void)
+{
+    if ((!_vmm_context->virq_status) &&
+        ( _vmm_context->virq_pended))
+    {
+        return 0;
+    }
+
+    return -1;
+}
+
+/* 10 = len("%08x, ") */
+static char _vmbuf[10*ARRAY_SIZE(_vmm_context->virq_pending)];
+void vmm_dump_virq(void)
+{
+    int i, s;
+
+    vmm_info("---- virtual IRQ ----\n");
+    vmm_info("  status: %08x,   pended: %08x, pending:\n",
+               _vmm_context->virq_status, _vmm_context->virq_pended);
+    for (s = 0, i = 0; i < ARRAY_SIZE(_vmm_context->virq_pending); i++)
+    {
+        s += rt_snprintf(_vmbuf+s, sizeof(_vmbuf)-s,
+                         "%08x, ", _vmm_context->virq_pending[i]);
+    }
+    vmm_info("%.*s\n", sizeof(_vmbuf), _vmbuf);
+    vmm_info("---- virtual IRQ ----\n");
+}
+
+int vmm_virq_coherence_ok(void)
+{
+    int i, res;
+    int should_pend = 0;
+
+    for (i = 0; i < ARRAY_SIZE(_vmm_context->virq_pending); i++)
+    {
+        should_pend |= _vmm_context->virq_pending[i];
+    }
+
+    res = (_vmm_context->virq_pended == !!should_pend);
+
+    if (!res)
+    {
+        vmm_info("--- %x %x, %x\n",
+                 _vmm_context->virq_pended, should_pend, !!should_pend);
+    }
+
+    return res;
+}
+
+extern struct rt_thread vmm_thread;
+
+void vmm_show_guest_reg(void)
+{
+    struct rt_hw_stack *sp = vmm_thread.sp;
+#ifdef RT_VMM_USING_DOMAIN
+    unsigned long old_domain;
+
+    old_domain = vmm_context_enter_domain(super_domain_val);
+#endif
+
+    vmm_info("CPSR: %08x, PC: %08x, LR: %08x, SP: %08x\n",
+             sp->cpsr, sp->pc, sp->lr, sp+1);
+
+#ifdef RT_VMM_USING_DOMAIN
+    vmm_context_restore_domain(old_domain);
+#endif
+}
+
+void vmm_dump_domain(void)
+{
+    unsigned long dac;
+
+    asm volatile ("mrc p15, 0, %0, c3, c0\n" : "=r" (dac));
+    vmm_info("current DAC: %08x\n", dac);
+#ifdef RT_VMM_USING_DOMAIN
+    vmm_info("guest DAC: %08x, RTT DAC: %08x, super DAC: %08x\n",
+             guest_domain_val, vmm_domain_val, super_domain_val);
+#endif
+}
+
+void vmm_show_guest(void)
+{
+    vmm_show_guest_reg();
+    vmm_dump_virq();
+    vmm_dump_domain();
+}
+
+#ifdef RT_USING_FINSH
+#include <finsh.h>
+FINSH_FUNCTION_EXPORT_ALIAS(vmm_show_guest, vmm, show vmm status);
+#endif
+
+static int _bad_cpsr(unsigned long cpsr)
+{
+    int bad = 1;
+
+    switch (cpsr & MODEMASK)
+    {
+    case USERMODE:
+    case FIQMODE:
+    case IRQMODE:
+    case SVCMODE:
+#ifdef CPU_HAS_MONITOR_MODE
+    case MONITORMODE:
+#endif
+    case ABORTMODE:
+#ifdef CPU_HAS_HYP_MODE
+    case HYPMODE:
+#endif
+    case UNDEFMODE:
+    case MODEMASK:
+        bad = 0;
+        break;
+    };
+    return bad;
+}
+
+void vmm_verify_guest_status(struct rt_hw_stack *sp)
+{
+    int dump_vmm = 0;
+    unsigned long cpsr;
+#ifdef RT_VMM_USING_DOMAIN
+    unsigned long old_domain;
+
+    old_domain = vmm_context_enter_domain(super_domain_val);
+#endif
+
+    cpsr = sp->cpsr;
+    if (_bad_cpsr(cpsr))
+    {
+            vmm_info("=================================\n");
+            vmm_info("VMM WARING: bad CPSR in guest\n");
+            dump_vmm = 1;
+    }
+    else
+    {
+        if (cpsr & A_Bit && 0)
+        {
+            vmm_info("=================================\n");
+            vmm_info("VMM WARING: A bit is set in guest\n");
+            dump_vmm = 1;
+        }
+        if ((cpsr & I_Bit) && (sp->pc <= VMM_BEGIN))
+        {
+            vmm_info("=================================\n");
+            vmm_info("VMM WARING: IRQ disabled in guest\n");
+            dump_vmm = 1;
+        }
+        if (cpsr & F_Bit)
+        {
+            vmm_info("=================================\n");
+            vmm_info("VMM WARING: FIQ disabled in guest\n");
+            dump_vmm = 1;
+        }
+        if ((cpsr & MODEMASK) == USERMODE)
+        {
+            if (_vmm_context->virq_status & 1)
+            {
+                vmm_info("=================================\n");
+                vmm_info("VMM WARING: VIRQ disabled in user mode\n");
+                dump_vmm = 1;
+            }
+            if ((sp->pc > 0xbf000000) && (sp->pc < 0xffff0000))
+            {
+                vmm_info("=================================\n");
+                vmm_info("VMM WARING: executing kernel code in usr mode\n");
+                dump_vmm = 1;
+            }
+            /* FIXME: when the guest is suspended in user mode and its
+             * interrupts come, this can be misleading. */
+#if 0
+            if (_vmm_context->virq_pended)
+            {
+                vmm_info("=================================\n");
+                vmm_info("VMM WARING: VIRQ pended in user mode\n");
+                dump_vmm = 1;
+            }
+#endif
+        }
+        else if ((cpsr & MODEMASK) == SVCMODE && sp->pc < 0xbf000000)
+        {
+            vmm_info("=================================\n");
+            vmm_info("VMM WARING: executing usr code in svc mode\n");
+            dump_vmm = 1;
+        }
+    }
+
+#if 0
+    if (!vmm_virq_coherence_ok())
+    {
+        vmm_info("=================================\n");
+        vmm_info("VMM WARING: bad VIRQ status\n");
+        dump_vmm = 1;
+    }
+#endif
+
+    if (dump_vmm)
+    {
+        vmm_show_guest();
+        vmm_info("=================================\n");
+    }
+
+#ifdef RT_VMM_USING_DOMAIN
+    vmm_context_restore_domain(old_domain);
+#endif
+}
+

components/vmm/vmm_context.h

@@ -0,0 +1,28 @@
+/*
+ * COPYRIGHT (C) 2011-2021, Real-Thread Information Technology Ltd
+ * All rights reserved
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-11-04     Grissiom     add comment
+ */
+
+#ifndef __VMM_CONTEXT_H__
+#define __VMM_CONTEXT_H__
+
+#include <armv7.h> // for struct rt_hw_stack
+
+#include "vmm.h"
+
+void vmm_context_init(void *context_addr);
+#ifdef RT_VMM_USING_DOMAIN
+void vmm_context_init_domain(struct vmm_domain *domain);
+#endif
+void vmm_virq_pending(int irq);
+void vmm_verify_guest_status(struct rt_hw_stack *sp);
+
+void vmm_show_guest(void);
+#endif
+

components/vmm/vmm_iomap.c

@@ -0,0 +1,49 @@
+/*
+ *  VMM IO map table
+ *
+ * COPYRIGHT (C) 2011-2021, Real-Thread Information Technology Ltd
+ * All rights reserved
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-06-15     Bernard      the first verion
+ */
+#include <rtthread.h>
+#include "vmm.h"
+
+static struct vmm_iomap _vmm_iomap[RT_VMM_IOMAP_MAXNR];
+
+void vmm_iomap_init(struct vmm_iomap *iomap)
+{
+    rt_memcpy(_vmm_iomap, iomap, sizeof(_vmm_iomap));
+}
+
+/* find virtual address according to name */
+unsigned long vmm_find_iomap(const char *name)
+{
+    int i;
+
+    for (i = 0; i < ARRAY_SIZE(_vmm_iomap); i++)
+    {
+        if (rt_strcmp(_vmm_iomap[i].name, name) == 0)
+            return (unsigned long)_vmm_iomap[i].va;
+    }
+
+    return 0;
+}
+
+/* find virtual address according to physcal address */
+unsigned long vmm_find_iomap_by_pa(unsigned long pa)
+{
+    int i;
+
+    for (i = 0; i < ARRAY_SIZE(_vmm_iomap); i++)
+    {
+        if (_vmm_iomap[i].pa == pa)
+            return (unsigned long)_vmm_iomap[i].va;
+    }
+
+    return 0;
+}

components/vmm/vmm_vector.c

@@ -0,0 +1,31 @@
+/*
+ *  VMM vector handle
+ *
+ * COPYRIGHT (C) 2011-2021, Real-Thread Information Technology Ltd
+ * All rights reserved
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-06-15     Bernard      the first verion
+ */
+#include <rthw.h>
+#include <rtthread.h>
+#include <interrupt.h>
+#include "vmm.h"
+
+void vmm_guest_isr(int irqno, void* parameter)
+{
+    /* nothing, let GuestOS to handle it */
+    rt_hw_interrupt_clear(irqno);
+}
+
+void vmm_vector_init(void)
+{
+    rt_hw_interrupt_install(RT_VMM_VIRQ_TRIGGER, vmm_guest_isr, RT_NULL, "virq");
+    rt_hw_interrupt_umask(RT_VMM_VIRQ_TRIGGER);
+
+    return;
+}
+