2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/* This file provides basic types and some constants for the
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* SYS_DEVIO and SYS_VDEVIO system calls, which allow user-level
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* processes to perform device I/O.
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*
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* Created:
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* Apr 08, 2004 by Jorrit N. Herder
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*/
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#ifndef _DEVIO_H
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#define _DEVIO_H
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#include <minix/sys_config.h> /* needed to include <minix/type.h> */
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#include <minix/types.h> /* u8_t, u16_t, u32_t needed */
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typedef u16_t port_t;
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/* We have different granularities of port I/O: 8, 16, 32 bits.
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* Also see <ibm/portio.h>, which has functions for bytes, words,
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* and longs. Hence, we need different (port,value)-pair types.
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*/
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typedef struct { u16_t port; u8_t value; } pvb_pair_t;
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typedef struct { u16_t port; u16_t value; } pvw_pair_t;
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typedef struct { u16_t port; u32_t value; } pvl_pair_t;
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/* Macro shorthand to set (port,value)-pair. */
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#define pv_set(pv, p, v) do { \
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u32_t _p = (p), _v = (v); \
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(pv).port = _p; \
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(pv).value = _v; \
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if((pv).port != _p || (pv).value != _v) { \
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printf("%s:%d: actual port: 0x%x != 0x%x || " \
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"actual value: 0x%x != 0x%x\n", \
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__FILE__, __LINE__, (pv).port, _p, (pv).value, _v); \
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panic("pv_set(" #pv ", " #p ", " #v ")"); \
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} \
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} while(0)
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#if 0 /* no longer in use !!! */
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/* Define a number of flags to indicate granularity we are using. */
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#define MASK_GRANULARITY 0x000F /* not in use! does not match flags */
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#define PVB_FLAG 'b'
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#define PVW_FLAG 'w'
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#define PVL_FLAG 'l'
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/* Flags indicating whether request wants to do input or output. */
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#define MASK_IN_OR_OUT 0x00F0
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#define DEVIO_INPUT 0x0010
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#define DEVIO_OUTPUT 0x0020
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#endif /* 0 */
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#if 0 /* no longer used !!! */
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/* Define how large the (port,value)-pair buffer in the kernel is.
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* This buffer is used to copy the (port,value)-pairs in kernel space.
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*/
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#define PV_BUF_SIZE 64 /* creates char pv_buf[PV_BUF_SIZE] */
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/* Note that SYS_VDEVIO sends a pointer to a vector of (port,value)-pairs,
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* whereas SYS_DEVIO includes a single (port,value)-pair in the messages.
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* Calculate maximum number of (port,value)-pairs that can be handled
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* in a single SYS_VDEVIO system call with above struct definitions.
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*/
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#define MAX_PVB_PAIRS ((PV_BUF_SIZE * sizeof(char)) / sizeof(pvb_pair_t))
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#define MAX_PVW_PAIRS ((PV_BUF_SIZE * sizeof(char)) / sizeof(pvw_pair_t))
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#define MAX_PVL_PAIRS ((PV_BUF_SIZE * sizeof(char)) / sizeof(pvl_pair_t))
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#endif /* 0 */
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#endif /* _DEVIO_H */
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