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