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mirror of https://gitlab.os-k.eu/os-k-team/kvisc.git synced 2023-08-25 14:05:46 +02:00
kvisc/vm/dv/cpudev.c
2019-06-15 14:20:35 +02:00

142 lines
2.8 KiB
C

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