Initial revision

kernel/const.h

@@ -0,0 +1,55 @@
+/* General constants used by the kernel. */
+
+#include <ibm/interrupt.h>	/* interrupt numbers and hardware vectors */
+#include <ibm/ports.h>		/* port addresses and magic numbers */
+#include <ibm/bios.h>		/* BIOS addresses, sizes and magic numbers */
+
+#if (CHIP == INTEL)
+
+/* To translate an address in kernel space to a physical address.  This is
+ * the same as umap_local(proc_ptr, D, vir, sizeof(*vir)), but less costly.
+ */
+#define vir2phys(vir)	(data_base + (vir_bytes) (vir))
+
+/* Constants used in virtual_copy(). Values must be 0 and 1, respectively! */
+#define _SRC_	0
+#define _DST_	1
+
+/* Translate a pointer to a field in a structure to a pointer to the structure
+ * itself.  So it translates '&struct_ptr->field' back to 'struct_ptr'.
+ */
+#define structof(type, field, ptr) \
+	((type *) (((char *) (ptr)) - offsetof(type, field)))
+
+/* How many bytes for the kernel stack. Space allocated in mpx.s. */
+#define K_STACK_BYTES   1024	
+
+/* How many bytes for (port,value)-pairs vector to copy in. */
+#define VDEVIO_BUF_SIZE  128
+
+/* Program stack words and masks. */
+#define INIT_PSW      0x0200	/* initial psw */
+#define INIT_TASK_PSW 0x1200	/* initial psw for tasks (with IOPL 1) */
+#define TRACEBIT       0x100	/* OR this with psw in proc[] for tracing */
+#define SETPSW(rp, new)	/* permits only certain bits to be set */ \
+	((rp)->p_reg.psw = (rp)->p_reg.psw & ~0xCD5 | (new) & 0xCD5)
+#define IF_MASK 0x00000200
+#define IOPL_MASK 0x003000
+
+/* Disable/Enable hardware interrupts. */
+#define lock()		intr_disable()
+#define unlock()	intr_enable()
+
+/* Sizes of memory tables. The boot monitor distinguishes three memory areas, 
+ * namely low mem below 1M, 1M-16M, and mem after 16M. More chunks are needed
+ * for DOS MINIX.
+ */
+#define NR_MEMS            8	/* number of chunks of memory */
+
+
+#endif /* (CHIP == INTEL) */
+
+#if (CHIP == M68000)
+/* M68000 specific constants go here. */
+#endif /* (CHIP == M68000) */
+