Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / openbios / arch / x86 / context.h

diff --git a/qemu/roms/openbios/arch/x86/context.h b/qemu/roms/openbios/arch/x86/context.h
new file mode 100644 (file)
index 0000000..6a1c5ad
--- /dev/null
+++ b/qemu/roms/openbios/arch/x86/context.h
@@ -0,0 +1,48 @@
+#ifndef i386_CONTEXT_H
+#define i386_CONTEXT_H
+
+struct context {
+    /* Stack Segment, placed here because of the alignment issue... */
+    uint16_t ss;
+    /* Used with sgdt/lgdt */
+    uint16_t gdt_limit;
+    uint32_t gdt_base;
+    /* General registers, accessed with pushal/popal */
+    uint32_t edi;
+    uint32_t esi;
+    uint32_t ebp;
+    uint32_t esp; /* points just below eax */
+    uint32_t ebx;
+    uint32_t edx;
+    uint32_t ecx;
+    uint32_t eax;
+#define ESP_LOC(ctx) (&(ctx)->gs)
+    /* Segment registers */
+    uint32_t gs;
+    uint32_t fs;
+    uint32_t es;
+    uint32_t ds;
+    /* Flags */
+    uint32_t eflags;
+    /* Code segment:offset */
+    uint32_t eip;
+    uint32_t cs;
+    /* Optional stack contents */
+    uint32_t return_addr;
+    uint32_t param[0];
+};
+
+/* Create a new context in the given stack */
+struct context *
+init_context(uint8_t *stack, uint32_t stack_size, int num_param);
+
+/* Switch context */
+struct context *switch_to(struct context *);
+
+/* Holds physical address of boot context */
+extern unsigned long __boot_ctx;
+
+/* This can always be safely used to refer to the boot context */
+#define boot_ctx ((struct context *) phys_to_virt(__boot_ctx))
+
+#endif /* i386_CONTEXT_H */