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disk: Add "struct volumeinfo" to store volume related info

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Change-Id: Ifd338d38db127d7896c43d1d25e70d0fae29fa1c
This commit is contained in:
Aidan MacDonald 2022-12-22 17:41:03 +00:00 • committed by Solomon Peachy
parent 440fcb86d6
commit 028f283ee5
2 changed files with 34 additions and 19 deletions
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47
firmware/common/disk.c
View file

@ -78,18 +78,26 @@
(((uint16_t)array[pos+0] << 0) | \
((uint16_t)array[pos+1] << 8))
/* space for 4 partitions on 2 drives */
static struct partinfo part[NUM_DRIVES*MAX_PARTITIONS_PER_DRIVE];
/* mounted to which drive (-1 if none) */
static int vol_drive[NUM_VOLUMES];
static struct volumeinfo volumes[NUM_VOLUMES];
/* check if the entry points to a free volume */
static bool is_free_volume(const struct volumeinfo *vi)
{
return vi->drive < 0;
}
/* mark a volume entry as free */
static void mark_free_volume(struct volumeinfo *vi)
{
vi->drive = -1;
}
static int get_free_volume(void)
{
for (int i = 0; i < NUM_VOLUMES; i++)
{
if (vol_drive[i] == -1) /* unassigned? */
if (is_free_volume(&volumes[i]))
return i;
}
return -1; /* none found */
}
@ -320,7 +328,7 @@ int disk_mount(int drive)
fat_get_bytes_per_sector(IF_MV(volume)) / SECTOR_SIZE;
#endif
mounted = 1;
vol_drive[volume] = drive; /* remember the drive for this volume */
volumes[volume].drive = drive;
volume_onmount_internal(IF_MV(volume));
}
@ -343,7 +351,7 @@ int disk_mount(int drive)
pinfo[i].start *= j;
pinfo[i].size *= j;
mounted++;
vol_drive[volume] = drive; /* remember the drive for this volume */
volumes[volume].drive = drive;
disk_sector_multiplier[drive] = j;
volume_onmount_internal(IF_MV(volume));
volume = get_free_volume(); /* prepare next entry */
@ -354,7 +362,7 @@ int disk_mount(int drive)
if (!fat_mount(IF_MV(volume,) IF_MD(drive,) pinfo[i].start))
{
mounted++;
vol_drive[volume] = drive; /* remember the drive for this volume */
volumes[volume].drive = drive;
volume_onmount_internal(IF_MV(volume));
volume = get_free_volume(); /* prepare next entry */
}
@ -376,8 +384,9 @@ int disk_mount_all(void)
volume_onunmount_internal(IF_MV(-1));
fat_init();
/* mark all volumes as free */
for (int i = 0; i < NUM_VOLUMES; i++)
vol_drive[i] = -1; /* mark all as unassigned */
mark_free_volume(&volumes[i]);
for (int i = 0; i < NUM_DRIVES; i++)
{
@ -402,13 +411,13 @@ int disk_unmount(int drive)
for (int i = 0; i < NUM_VOLUMES; i++)
{
if (vol_drive[i] == drive)
{ /* force releasing resources */
vol_drive[i] = -1; /* mark unused */
struct volumeinfo *vi = &volumes[i];
/* unmount any volumes on the drive */
if (vi->drive == drive)
{
mark_free_volume(vi); /* FIXME: should do this after unmount? */
volume_onunmount_internal(IF_MV(i));
fat_unmount(IF_MV(i));
unmounted++;
}
}
@ -517,20 +526,20 @@ static int volume_properties(int volume, enum volume_info_type infotype)
if (CHECK_VOL(volume))
{
int vd = vol_drive[volume];
struct volumeinfo *vi = &volumes[volume];
switch (infotype)
{
#ifdef HAVE_HOTSWAP
case VP_REMOVABLE:
res = storage_removable(vd) ? 1 : 0;
res = storage_removable(vi->drive) ? 1 : 0;
break;
case VP_PRESENT:
res = storage_present(vd) ? 1 : 0;
res = storage_present(vi->drive) ? 1 : 0;
break;
#endif
#if defined(HAVE_MULTIDRIVE) || defined(HAVE_DIRCACHE)
case VP_DRIVE:
res = vd;
res = vi->drive;
break;
#endif
}

6
firmware/export/mv.h
View file

@ -103,6 +103,12 @@
#define CHECK_DRV(drive) \
((unsigned int)IF_MD_DRV(drive) < NUM_DRIVES)
/* contains info about a volume */
struct volumeinfo
{
int drive; /* drive number */
};
/* Volume-centric functions (in disk.c) */
void volume_recalc_free(IF_MV_NONVOID(int volume));
unsigned int volume_get_cluster_size(IF_MV_NONVOID(int volume));