From 9e80202352dd49bdd9e67b8b906d86f058431505 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <tpearson@raptorengineering.com>
Date: Sat, 11 May 2019 15:12:49 -0500
Subject: Initial import of abandoned HQEMU version 2.5.2
---
src/roms/openbios/arch/x86/context.h | 48 ++++++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
create mode 100644 src/roms/openbios/arch/x86/context.h
(limited to 'src/roms/openbios/arch/x86/context.h')
diff --git a/src/roms/openbios/arch/x86/context.h b/src/roms/openbios/arch/x86/context.h
new file mode 100644
index 0000000..6a1c5ad
--- /dev/null
+++ b/src/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 */
--
cgit v1.1