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Add a set of bus_space(9) functions for g2bus devices with 

sparse address space. This is required for SEGA LAN adapter support.
This commit is contained in:
tsutsui 2002-12-27 11:34:05 +00:00
parent f464631d66
commit c680050521
2 changed files with 185 additions and 2 deletions
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184
sys/arch/dreamcast/dev/g2/g2bus_bus_mem.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: g2bus_bus_mem.c,v 1.5 2002/03/03 14:31:29 uch Exp $ */
/* $NetBSD: g2bus_bus_mem.c,v 1.6 2002/12/27 11:34:05 tsutsui Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
@ -77,6 +77,29 @@ void g2bus_bus_mem_read_region_1(void *, bus_space_handle_t, bus_size_t,
void g2bus_bus_mem_write_region_1(void *, bus_space_handle_t, bus_size_t,
const u_int8_t *, bus_size_t);
u_int8_t g2bus_sparse_bus_mem_read_1(void *, bus_space_handle_t, bus_size_t);
u_int16_t g2bus_sparse_bus_mem_read_2(void *, bus_space_handle_t, bus_size_t);
u_int32_t g2bus_sparse_bus_mem_read_4(void *, bus_space_handle_t, bus_size_t);
void g2bus_sparse_bus_mem_write_1(void *, bus_space_handle_t, bus_size_t,
u_int8_t);
void g2bus_sparse_bus_mem_write_2(void *, bus_space_handle_t, bus_size_t,
u_int16_t);
void g2bus_sparse_bus_mem_write_4(void *, bus_space_handle_t, bus_size_t,
u_int32_t);
void g2bus_sparse_bus_mem_read_region_1(void *, bus_space_handle_t,
bus_size_t, u_int8_t *, bus_size_t);
void g2bus_sparse_bus_mem_write_region_1(void *, bus_space_handle_t,
bus_size_t, const u_int8_t *, bus_size_t);
void g2bus_sparse_bus_mem_read_multi_1(void *, bus_space_handle_t,
bus_size_t, u_int8_t *, bus_size_t);
void g2bus_sparse_bus_mem_write_multi_1(void *, bus_space_handle_t,
bus_size_t, const u_int8_t *, bus_size_t);
void
g2bus_bus_mem_init(struct g2bus_softc *sc)
{
@ -243,3 +266,162 @@ g2bus_bus_mem_write_region_1(void *v, bus_space_handle_t sh, bus_size_t off,
G2_UNLOCK;
}
void
g2bus_set_bus_mem_sparse(bus_space_tag_t memt)
{
memt->dbs_r_1 = g2bus_sparse_bus_mem_read_1;
memt->dbs_r_2 = g2bus_sparse_bus_mem_read_2;
memt->dbs_r_4 = g2bus_sparse_bus_mem_read_4;
memt->dbs_w_1 = g2bus_sparse_bus_mem_write_1;
memt->dbs_w_2 = g2bus_sparse_bus_mem_write_2;
memt->dbs_w_4 = g2bus_sparse_bus_mem_write_4;
memt->dbs_rr_1 = g2bus_sparse_bus_mem_read_region_1;
memt->dbs_wr_1 = g2bus_sparse_bus_mem_write_region_1;
memt->dbs_rm_1 = g2bus_sparse_bus_mem_read_multi_1;
memt->dbs_wm_1 = g2bus_sparse_bus_mem_write_multi_1;
}
u_int8_t
g2bus_sparse_bus_mem_read_1(void *v, bus_space_handle_t sh, bus_size_t off)
{
u_int8_t rv;
G2_LOCK;
rv = *(__volatile u_int8_t *)(sh + (off * 4));
G2_UNLOCK;
return (rv);
}
u_int16_t
g2bus_sparse_bus_mem_read_2(void *v, bus_space_handle_t sh, bus_size_t off)
{
u_int16_t rv;
G2_LOCK;
rv = *(__volatile u_int16_t *)(sh + (off * 4));
G2_UNLOCK;
return (rv);
}
u_int32_t
g2bus_sparse_bus_mem_read_4(void *v, bus_space_handle_t sh, bus_size_t off)
{
u_int32_t rv;
G2_LOCK;
rv = *(__volatile u_int32_t *)(sh + (off * 4));
G2_UNLOCK;
return (rv);
}
void
g2bus_sparse_bus_mem_write_1(void *v, bus_space_handle_t sh, bus_size_t off,
u_int8_t val)
{
G2_LOCK;
*(__volatile u_int8_t *)(sh + (off * 4)) = val;
G2_UNLOCK;
}
void
g2bus_sparse_bus_mem_write_2(void *v, bus_space_handle_t sh, bus_size_t off,
u_int16_t val)
{
G2_LOCK;
*(__volatile u_int16_t *)(sh + (off * 4)) = val;
G2_UNLOCK;
}
void
g2bus_sparse_bus_mem_write_4(void *v, bus_space_handle_t sh, bus_size_t off,
u_int32_t val)
{
G2_LOCK;
*(__volatile u_int32_t *)(sh + (off * 4)) = val;
G2_UNLOCK;
}
void
g2bus_sparse_bus_mem_read_region_1(void *v, bus_space_handle_t sh,
bus_size_t off, u_int8_t *addr, bus_size_t len)
{
__volatile const u_int8_t *baddr = (u_int8_t *)(sh + (off * 4));
G2_LOCK;
while (len--) {
*addr++ = *baddr;
baddr += 4;
}
G2_UNLOCK;
}
void
g2bus_sparse_bus_mem_write_region_1(void *v, bus_space_handle_t sh,
bus_size_t off, const u_int8_t *addr, bus_size_t len)
{
__volatile u_int8_t *baddr = (u_int8_t *)(sh + (off * 4));
G2_LOCK;
while (len--) {
*baddr = *addr++;
baddr += 4;
}
G2_UNLOCK;
}
void
g2bus_sparse_bus_mem_read_multi_1(void *v, bus_space_handle_t sh,
bus_size_t off, u_int8_t *addr, bus_size_t len)
{
__volatile const u_int8_t *baddr = (u_int8_t *)(sh + (off * 4));
G2_LOCK;
while (len--)
*addr++ = *baddr;
G2_UNLOCK;
}
void
g2bus_sparse_bus_mem_write_multi_1(void *v, bus_space_handle_t sh,
bus_size_t off, const u_int8_t *addr, bus_size_t len)
{
__volatile u_int8_t *baddr = (u_int8_t *)(sh + (off * 4));
G2_LOCK;
while (len--)
*baddr = *addr++;
G2_UNLOCK;
}

3
sys/arch/dreamcast/dev/g2/g2busvar.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: g2busvar.h,v 1.3 2002/12/23 09:59:25 tsutsui Exp $ */
/* $NetBSD: g2busvar.h,v 1.4 2002/12/27 11:34:05 tsutsui Exp $ */
/*-
* Copyright (c) 2001 Marcus Comstedt
@ -64,5 +64,6 @@ struct g2bus_softc {
};
void g2bus_bus_mem_init(struct g2bus_softc *);
void g2bus_set_bus_mem_sparse(bus_space_tag_t);
#endif /* _DREAMCAST_G2BUSVAR_H_ */