Changeset aecf79f in mainline for kernel/arch/xen32/include/asm.h

Timestamp:

2006-07-24T16:07:15Z (18 years ago)

Author:

Martin Decky <martin@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

c59dd1a2

Parents:

7b0599b

Message:

xen memory initialization

File:

• kernel/arch/xen32/include/asm.h (modified) (1 diff, 1 prop)

kernel/arch/xen32/include/asm.h

@@ -1 @@
-../../ia32/include/asm.h
+/*
+ * Copyright (C) 2001-2004 Jakub Jermar
+ * Copyright (C) 2005 Sergey Bondari
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - 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.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+/** @addtogroup xen32
+ * @{
+ */
+/** @file
+ */
+
+#ifndef __xen32_ASM_H__
+#define __xen32_ASM_H__
+
+#include <arch/pm.h>
+#include <arch/types.h>
+#include <config.h>
+
+extern uint32_t interrupt_handler_size;
+
+extern void paging_on(void);
+
+extern void interrupt_handlers(void);
+
+extern void enable_l_apic_in_msr(void);
+
+
+extern void asm_delay_loop(uint32_t t);
+extern void asm_fake_loop(uint32_t t);
+
+
+/** Halt CPU
+ *
+ * Halt the current CPU until interrupt event.
+ */
+static inline void cpu_halt(void) { __asm__("hlt\n"); };
+static inline void cpu_sleep(void) { __asm__("hlt\n"); };
+
+#define GEN_READ_REG(reg) static inline unative_t read_ ##reg (void) \
+    { \
+        unative_t res; \
+        __asm__ volatile ("movl %%" #reg ", %0" : "=r" (res) ); \
+        return res; \
+    }
+
+#define GEN_WRITE_REG(reg) static inline void write_ ##reg (unative_t regn) \
+    { \
+        __asm__ volatile ("movl %0, %%" #reg : : "r" (regn)); \
+    }
+
+GEN_READ_REG(cr0);
+GEN_READ_REG(cr2);
+GEN_READ_REG(cr3);
+GEN_WRITE_REG(cr3);
+
+GEN_READ_REG(dr0);
+GEN_READ_REG(dr1);
+GEN_READ_REG(dr2);
+GEN_READ_REG(dr3);
+GEN_READ_REG(dr6);
+GEN_READ_REG(dr7);
+
+GEN_WRITE_REG(dr0);
+GEN_WRITE_REG(dr1);
+GEN_WRITE_REG(dr2);
+GEN_WRITE_REG(dr3);
+GEN_WRITE_REG(dr6);
+GEN_WRITE_REG(dr7);
+
+/** Byte to port
+ *
+ * Output byte to port
+ *
+ * @param port Port to write to
+ * @param val Value to write
+ */
+static inline void outb(uint16_t port, uint8_t val) { __asm__ volatile ("outb %b0, %w1\n" : : "a" (val), "d" (port) ); }
+
+/** Word to port
+ *
+ * Output word to port
+ *
+ * @param port Port to write to
+ * @param val Value to write
+ */
+static inline void outw(uint16_t port, uint16_t val) { __asm__ volatile ("outw %w0, %w1\n" : : "a" (val), "d" (port) ); }
+
+/** Double word to port
+ *
+ * Output double word to port
+ *
+ * @param port Port to write to
+ * @param val Value to write
+ */
+static inline void outl(uint16_t port, uint32_t val) { __asm__ volatile ("outl %l0, %w1\n" : : "a" (val), "d" (port) ); }
+
+/** Byte from port
+ *
+ * Get byte from port
+ *
+ * @param port Port to read from
+ * @return Value read
+ */
+static inline uint8_t inb(uint16_t port) { uint8_t val; __asm__ volatile ("inb %w1, %b0 \n" : "=a" (val) : "d" (port) ); return val; }
+
+/** Word from port
+ *
+ * Get word from port
+ *
+ * @param port Port to read from
+ * @return Value read
+ */
+static inline uint16_t inw(uint16_t port) { uint16_t val; __asm__ volatile ("inw %w1, %w0 \n" : "=a" (val) : "d" (port) ); return val; }
+
+/** Double word from port
+ *
+ * Get double word from port
+ *
+ * @param port Port to read from
+ * @return Value read
+ */
+static inline uint32_t inl(uint16_t port) { uint32_t val; __asm__ volatile ("inl %w1, %l0 \n" : "=a" (val) : "d" (port) ); return val; }
+
+/** Enable interrupts.
+ *
+ * Enable interrupts and return previous
+ * value of EFLAGS.
+ *
+ * @return Old interrupt priority level.
+ */
+static inline ipl_t interrupts_enable(void)
+{
+        ipl_t v;
+        __asm__ volatile (
+                "pushf\n\t"
+                "popl %0\n\t"
+                "sti\n"
+                : "=r" (v)
+        );
+        return v;
+}
+
+/** Disable interrupts.
+ *
+ * Disable interrupts and return previous
+ * value of EFLAGS.
+ *
+ * @return Old interrupt priority level.
+ */
+static inline ipl_t interrupts_disable(void)
+{
+        ipl_t v;
+        __asm__ volatile (
+                "pushf\n\t"
+                "popl %0\n\t"
+                "cli\n"
+                : "=r" (v)
+        );
+        return v;
+}
+
+/** Restore interrupt priority level.
+ *
+ * Restore EFLAGS.
+ *
+ * @param ipl Saved interrupt priority level.
+ */
+static inline void interrupts_restore(ipl_t ipl)
+{
+        __asm__ volatile (
+                "pushl %0\n\t"
+                "popf\n"
+                : : "r" (ipl)
+        );
+}
+
+/** Return interrupt priority level.
+ *
+ * @return EFLAFS.
+ */
+static inline ipl_t interrupts_read(void)
+{
+        ipl_t v;
+        __asm__ volatile (
+                "pushf\n\t"
+                "popl %0\n"
+                : "=r" (v)
+        );
+        return v;
+}
+
+/** Return base address of current stack
+ *
+ * Return the base address of the current stack.
+ * The stack is assumed to be STACK_SIZE bytes long.
+ * The stack must start on page boundary.
+ */
+static inline uintptr_t get_stack_base(void)
+{
+        uintptr_t v;
+        
+        __asm__ volatile ("andl %%esp, %0\n" : "=r" (v) : "0" (~(STACK_SIZE-1)));
+        
+        return v;
+}
+
+static inline uint64_t rdtsc(void)
+{
+        uint64_t v;
+        
+        __asm__ volatile("rdtsc\n" : "=A" (v));
+        
+        return v;
+}
+
+/** Return current IP address */
+static inline uintptr_t * get_ip() 
+{
+        uintptr_t *ip;
+
+        __asm__ volatile (
+                "mov %%eip, %0"
+                : "=r" (ip)
+                );
+        return ip;
+}
+
+/** Invalidate TLB Entry.
+ *
+ * @param addr Address on a page whose TLB entry is to be invalidated.
+ */
+static inline void invlpg(uintptr_t addr)
+{
+        __asm__ volatile ("invlpg %0\n" :: "m" (*(unative_t *)addr));
+}
+
+/** Load GDTR register from memory.
+ *
+ * @param gdtr_reg Address of memory from where to load GDTR.
+ */
+static inline void gdtr_load(ptr_16_32_t *gdtr_reg)
+{
+        __asm__ volatile ("lgdtl %0\n" : : "m" (*gdtr_reg));
+}
+
+/** Store GDTR register to memory.
+ *
+ * @param gdtr_reg Address of memory to where to load GDTR.
+ */
+static inline void gdtr_store(ptr_16_32_t *gdtr_reg)
+{
+        __asm__ volatile ("sgdtl %0\n" : : "m" (*gdtr_reg));
+}
+
+/** Load IDTR register from memory.
+ *
+ * @param idtr_reg Address of memory from where to load IDTR.
+ */
+static inline void idtr_load(ptr_16_32_t *idtr_reg)
+{
+        __asm__ volatile ("lidtl %0\n" : : "m" (*idtr_reg));
+}
+
+/** Load TR from descriptor table.
+ *
+ * @param sel Selector specifying descriptor of TSS segment.
+ */
+static inline void tr_load(uint16_t sel)
+{
+        __asm__ volatile ("ltr %0" : : "r" (sel));
+}
+
+#endif
+
+/** @}
+ */