diff options
| -rw-r--r-- | src/arch/loong64/core/loong64_io.c | 46 | ||||
| -rw-r--r-- | src/arch/loong64/include/bits/io.h | 2 | ||||
| -rw-r--r-- | src/arch/loong64/include/ipxe/loong64_io.h | 82 |
3 files changed, 130 insertions, 0 deletions
diff --git a/src/arch/loong64/core/loong64_io.c b/src/arch/loong64/core/loong64_io.c new file mode 100644 index 0000000..6e2a78a --- /dev/null +++ b/src/arch/loong64/core/loong64_io.c @@ -0,0 +1,46 @@ +/* + * Copyright (c) 2023, Xiaotian Wu <wuxiaotian@loongson.cn> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + * + * You can also choose to distribute this program under the terms of + * the Unmodified Binary Distribution Licence (as given in the file + * COPYING.UBDL), provided that you have satisfied its requirements. + */ + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +#include <ipxe/io.h> +#include <ipxe/loong64_io.h> + +/** @file + * + * iPXE I/O API for LoongArch64 + * + */ + +PROVIDE_IOAPI_INLINE ( loong64, phys_to_bus ); +PROVIDE_IOAPI_INLINE ( loong64, bus_to_phys ); +PROVIDE_IOAPI_INLINE ( loong64, readb ); +PROVIDE_IOAPI_INLINE ( loong64, readw ); +PROVIDE_IOAPI_INLINE ( loong64, readl ); +PROVIDE_IOAPI_INLINE ( loong64, readq ); +PROVIDE_IOAPI_INLINE ( loong64, writeb ); +PROVIDE_IOAPI_INLINE ( loong64, writew ); +PROVIDE_IOAPI_INLINE ( loong64, writel ); +PROVIDE_IOAPI_INLINE ( loong64, writeq ); +PROVIDE_IOAPI_INLINE ( loong64, mb ); +PROVIDE_DUMMY_PIO ( loong64 ); diff --git a/src/arch/loong64/include/bits/io.h b/src/arch/loong64/include/bits/io.h index 20ca6a7..e9bcf2e 100644 --- a/src/arch/loong64/include/bits/io.h +++ b/src/arch/loong64/include/bits/io.h @@ -12,4 +12,6 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); /** Page shift */ #define PAGE_SHIFT 12 +#include <ipxe/loong64_io.h> + #endif /* _BITS_IO_H */ diff --git a/src/arch/loong64/include/ipxe/loong64_io.h b/src/arch/loong64/include/ipxe/loong64_io.h new file mode 100644 index 0000000..939fbf2 --- /dev/null +++ b/src/arch/loong64/include/ipxe/loong64_io.h @@ -0,0 +1,82 @@ +#ifndef _IPXE_LOONG64_IO_H +#define _IPXE_LOONG64_IO_H + +/** @file + * + * iPXE I/O API for LoongArch64 + * + */ + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +#ifdef IOAPI_LOONG64 +#define IOAPI_PREFIX_loong64 +#else +#define IOAPI_PREFIX_loong64 __loong64_ +#endif + +#include <ipxe/dummy_pio.h> + +/* + * Memory space mappings + * + */ + +/* + * Physical<->Bus address mappings + * + */ + +static inline __always_inline unsigned long +IOAPI_INLINE ( loong64, phys_to_bus ) ( unsigned long phys_addr ) { + return phys_addr; +} + +static inline __always_inline unsigned long +IOAPI_INLINE ( loong64, bus_to_phys ) ( unsigned long bus_addr ) { + return bus_addr; +} + +/* + * MMIO reads and writes up to native word size + * + */ + +#define LOONG64_READX( _suffix, _type, _insn_suffix ) \ +static inline __always_inline _type \ +IOAPI_INLINE ( loong64, read ## _suffix ) ( volatile _type *io_addr ) { \ + _type data; \ + __asm__ __volatile__ ( "ld." _insn_suffix " %0, %1" \ + : "=r" ( data ) : "m" ( *io_addr ) ); \ + return data; \ +} +LOONG64_READX ( b, uint8_t, "bu"); +LOONG64_READX ( w, uint16_t, "hu"); +LOONG64_READX ( l, uint32_t, "wu"); +LOONG64_READX ( q, uint64_t, "d"); + +#define LOONG64_WRITEX( _suffix, _type, _insn_suffix ) \ +static inline __always_inline void \ +IOAPI_INLINE ( loong64, write ## _suffix ) ( _type data, \ + volatile _type *io_addr ) { \ + __asm__ __volatile__ ( "st." _insn_suffix " %0, %1" \ + : : "r" ( data ), "m" ( *io_addr ) ); \ +} +LOONG64_WRITEX ( b, uint8_t, "b"); +LOONG64_WRITEX ( w, uint16_t, "h"); +LOONG64_WRITEX ( l, uint32_t, "w" ); +LOONG64_WRITEX ( q, uint64_t, "d"); + +/* + * Memory barrier + * + */ +static inline __always_inline void +IOAPI_INLINE ( loong64, mb ) ( void ) { + __asm__ __volatile__ ( "dbar 0" ); +} + +/* Dummy PIO */ +DUMMY_PIO ( loong64 ); + +#endif /* _IPXE_LOONG64_IO_H */ |