142 lines
2.8 KiB
C
142 lines
2.8 KiB
C
// The OS/K Team licenses this file to you under the MIT license.
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// See the LICENSE file in the project root for more information.
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#include <pc/dev.h>
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//----------------------------------------------------------------------------//
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#define MAX_RFRAME_IDX 255
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//
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// Register frames
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//
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reg_t **rfs = NULL;
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size_t current_idx = 0;
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size_t rfs_used = 0;
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#define CHK_INDEX(idx) \
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if ((ulong)idx > MAX_RFRAME_IDX) \
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_except(ctx, E_UDF, "cpudev: invalid rframe index: #%u", idx);
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//----------------------------------------------------------------------------//
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long cpudev_getmaxidx(ctx_t *ctx, dev_t *dev)
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{
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rax = MAX_RFRAME_IDX;
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return 0;
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}
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long cpudev_getrfusage(ctx_t *ctx, dev_t *dev)
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{
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rax = rfs_used;
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return 0;
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}
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long cpudev_getcuridx(ctx_t *ctx, dev_t *dev)
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{
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rax = current_idx;
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return 0;
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}
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long cpudev_leastavail(ctx_t *ctx, dev_t *dev)
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{
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size_t it;
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for (it = 0; it <= MAX_RFRAME_IDX; it++)
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{
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if (rfs[it] == NULL)
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{
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rax = it;
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return 0;
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}
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}
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rax = -1;
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return 0;
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}
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//----------------------------------------------------------------------------//
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long cpudev_isactive(ctx_t *ctx, dev_t *dev)
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{
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CHK_INDEX(ax0);
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rax = (rfs[ax0] != NULL);
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return 0;
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}
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long cpudev_activate(ctx_t *ctx, dev_t *dev)
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{
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CHK_INDEX(ax0);
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if (rfs[ax0] != NULL)
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_except(ctx, E_UDF,
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"cpudev: activating already activated rframe: #%u", ax0);
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return 0;
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}
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long cpudev_deactivate(ctx_t *ctx, dev_t *dev)
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{
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CHK_INDEX(ax0);
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if (ax0 == 0)
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_except(ctx, E_UDF, "cpudev: deactivating rframe #0 (arch_r)");
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return 0;
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}
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//----------------------------------------------------------------------------//
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//----------------------------------------------------------------------------//
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long cpudev_poweron(ctx_t *ctx, dev_t *dev)
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{
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rfs = calloc(MAX_RFRAME_IDX + 2, sizeof(reg_t *));
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if (rfs == NULL)
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return -1;
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rfs[0] = ctx->r;
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rfs_used = 1;
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dev->state = DEVGOOD;
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dev->fslots[16] = cpudev_getmaxidx;
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dev->fslots[17] = cpudev_getrfusage;
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dev->fslots[18] = cpudev_getcuridx;
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dev->fslots[19] = cpudev_leastavail;
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dev->fslots[20] = cpudev_isactive;
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dev->fslots[21] = cpudev_activate;
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dev->fslots[22] = cpudev_deactivate;
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return 0;
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}
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long cpudev_poweroff(ctx_t *ctx, dev_t *dev)
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{
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if (rfs)
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free(rfs);
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return 0;
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}
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//----------------------------------------------------------------------------//
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dev_t cpudev =
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{
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.type = "cpu",
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.name = "K-CPU",
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.modl = "Prisma 1",
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.vend = "The OS/K Team",
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.major = KARCH_MAJOR,
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.minor = KARCH_MINOR,
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.revis = KARCH_REVIS,
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.fpwon = cpudev_poweron,
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};
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