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PPC64: implement missing busdma ops

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Add missing little-endian 64-bit read and write. Since there
is no direct ASM opcode for this, perform byte swap if
necessary.

Created by:            Wojciech Macek <wma@semihalf.com>
Obtained from:         Semihalf
Sponsored by:          QCM Technologies
This commit is contained in:
Wojciech Macek 2018-01-17 09:45:18 +00:00
parent 91769f6452
commit f7b509a109
1 changed files with 16 additions and 2 deletions
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18
sys/powerpc/powerpc/bus_machdep.c
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@ -43,6 +43,7 @@ __FBSDID("$FreeBSD$");
#include <sys/ktr.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <sys/endian.h>
#include <machine/bus.h>
#include <machine/pio.h>
@ -333,6 +334,7 @@ bs_be_ws_8(bus_space_handle_t bsh, bus_size_t ofs, uint64_t val)
addr = __ppc_ba(bsh, ofs);
*addr = val;
powerpc_iomb();
CTR4(KTR_BE_IO, "%s(bsh=%#x, ofs=%#x, val=%#x)", __func__, bsh, ofs, val);
}
static void
@ -532,7 +534,14 @@ bs_le_rs_4(bus_space_handle_t bsh, bus_size_t ofs)
static uint64_t
bs_le_rs_8(bus_space_handle_t bsh, bus_size_t ofs)
{
TODO;
volatile uint64_t *addr;
uint64_t res;
addr = __ppc_ba(bsh, ofs);
res = le64toh(*addr);
powerpc_iomb();
CTR4(KTR_LE_IO, "%s(bsh=%#x, ofs=%#x) = %#x", __func__, bsh, ofs, res);
return (res);
}
static void
@ -631,7 +640,12 @@ bs_le_ws_4(bus_space_handle_t bsh, bus_size_t ofs, uint32_t val)
static void
bs_le_ws_8(bus_space_handle_t bsh, bus_size_t ofs, uint64_t val)
{
TODO;
volatile uint64_t *addr;
addr = __ppc_ba(bsh, ofs);
*addr = htole64(val);
powerpc_iomb();
CTR4(KTR_LE_IO, "%s(bsh=%#x, ofs=%#x, val=%#x)", __func__, bsh, ofs, val);
}
static void