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arm_coreboot: Support DMA.

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This is needed to support USB and some other busses.
This commit is contained in:
Vladimir Serbinenko 2017-05-08 22:06:04 +02:00
parent 656c3b0d7f
commit 265292f2b0
8 changed files with 155 additions and 25 deletions
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1
grub-core/Makefile.am
View file

@ -248,6 +248,7 @@ KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/gfxterm.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/font.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/bufio.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/fdt.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/dma.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/arm/coreboot/kernel.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/fdtbus.h
endif

1
grub-core/Makefile.core.def
View file

@ -163,6 +163,7 @@ kernel = {
arm_coreboot = term/ps2.c;
arm_coreboot = term/arm/pl050.c;
arm_coreboot = commands/keylayouts.c;
arm_coreboot = kern/arm/coreboot/dma.c;
terminfoinkernel = term/terminfo.c;
terminfoinkernel = term/tparm.c;

34
grub-core/kern/arm/cache.c
View file

@ -29,6 +29,8 @@ void grub_arm_clean_dcache_range_armv6 (grub_addr_t start, grub_addr_t end,
grub_addr_t dlinesz);
void grub_arm_clean_dcache_range_armv7 (grub_addr_t start, grub_addr_t end,
grub_addr_t dlinesz);
void grub_arm_clean_dcache_range_poc_armv7 (grub_addr_t start, grub_addr_t end,
grub_addr_t dlinesz);
void grub_arm_invalidate_icache_range_armv6 (grub_addr_t start, grub_addr_t end,
grub_addr_t dlinesz);
void grub_arm_invalidate_icache_range_armv7 (grub_addr_t start, grub_addr_t end,
@ -252,6 +254,38 @@ grub_arch_sync_caches (void *address, grub_size_t len)
}
}
void
grub_arch_sync_dma_caches (volatile void *address, grub_size_t len)
{
grub_addr_t start = (grub_addr_t) address;
grub_addr_t end = start + len;
if (type == ARCH_UNKNOWN)
probe_caches ();
start = ALIGN_DOWN (start, grub_arch_cache_max_linesz);
end = ALIGN_UP (end, grub_arch_cache_max_linesz);
switch (type)
{
case ARCH_ARMV6:
grub_arm_clean_dcache_range_armv6 (start, end, grub_arch_cache_dlinesz);
grub_arm_invalidate_icache_range_armv6 (start, end,
grub_arch_cache_ilinesz);
break;
case ARCH_ARMV5_WRITE_THROUGH:
case ARCH_ARMV6_UNIFIED:
grub_arm_clean_dcache_range_armv6 (start, end, grub_arch_cache_dlinesz);
break;
case ARCH_ARMV7:
grub_arm_clean_dcache_range_poc_armv7 (start, end, grub_arch_cache_dlinesz);
grub_arm_invalidate_icache_range_armv7 (start, end,
grub_arch_cache_ilinesz);
break;
/* Pacify GCC. */
case ARCH_UNKNOWN:
break;
}
}
void
grub_arm_disable_caches_mmu (void)
{

12
grub-core/kern/arm/cache_armv7.S
View file

@ -33,6 +33,18 @@
# define ISB isb
#define ARMV7 1
FUNCTION(grub_arm_clean_dcache_range_poc_armv7)
DSB
@ Clean data cache for range to point-of-coherence
1: cmp r0, r1
bge 2f
mcr p15, 0, r0, c7, c14, 1 @ DCCMVAC
add r0, r0, r2 @ Next line
b 1b
2: DSB
bx lr
@ r0 - CLIDR
@ r1 - LoC
@ r2 - current level

59
grub-core/kern/arm/coreboot/dma.c Normal file
View file

@ -0,0 +1,59 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2007,2009 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/dl.h>
#include <grub/dma.h>
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/mm_private.h>
#include <grub/cache.h>
struct grub_pci_dma_chunk *
grub_memalign_dma32 (grub_size_t align, grub_size_t size)
{
void *ret;
if (align < 64)
align = 64;
size = ALIGN_UP (size, align);
ret = grub_memalign (align, size);
if (!ret)
return 0;
grub_arch_sync_dma_caches (ret, size);
return ret;
}
void
grub_dma_free (struct grub_pci_dma_chunk *ch)
{
grub_size_t size = (((struct grub_mm_header *) ch) - 1)->size * GRUB_MM_ALIGN;
grub_arch_sync_dma_caches (ch, size);
grub_free (ch);
}
volatile void *
grub_dma_get_virt (struct grub_pci_dma_chunk *ch)
{
return (void *) ch;
}
grub_uint32_t
grub_dma_get_phys (struct grub_pci_dma_chunk *ch)
{
return (grub_uint32_t) (grub_addr_t) ch;
}

7
include/grub/cache.h
View file

@ -34,15 +34,14 @@ void EXPORT_FUNC(grub_arch_sync_caches) (void *address, grub_size_t len);
#endif
#ifndef GRUB_MACHINE_EMU
#ifdef _mips
void EXPORT_FUNC(grub_arch_sync_dma_caches) (volatile void *address,
grub_size_t len);
#else
#if defined (__i386__) || defined (__x86_64__)
static inline void
grub_arch_sync_dma_caches (volatile void *address __attribute__ ((unused)),
grub_size_t len __attribute__ ((unused)))
{
}
#else
void EXPORT_FUNC(grub_arch_sync_dma_caches) (volatile void *address, grub_size_t len);
#endif
#endif

44
include/grub/dma.h Normal file
View file

@ -0,0 +1,44 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2008,2009 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GRUB_DMA_H
#define GRUB_DMA_H 1
struct grub_pci_dma_chunk;
struct grub_pci_dma_chunk *EXPORT_FUNC(grub_memalign_dma32) (grub_size_t align,
grub_size_t size);
void EXPORT_FUNC(grub_dma_free) (struct grub_pci_dma_chunk *ch);
volatile void *EXPORT_FUNC(grub_dma_get_virt) (struct grub_pci_dma_chunk *ch);
grub_uint32_t EXPORT_FUNC(grub_dma_get_phys) (struct grub_pci_dma_chunk *ch);
static inline void *
grub_dma_phys2virt (grub_uint32_t phys, struct grub_pci_dma_chunk *chunk)
{
return ((grub_uint8_t *) grub_dma_get_virt (chunk)
+ (phys - grub_dma_get_phys (chunk)));
}
static inline grub_uint32_t
grub_dma_virt2phys (volatile void *virt, struct grub_pci_dma_chunk *chunk)
{
return (((grub_uint8_t *) virt - (grub_uint8_t *) grub_dma_get_virt (chunk))
+ grub_dma_get_phys (chunk));
}
#endif

22
include/grub/pci.h
View file

@ -142,27 +142,7 @@ grub_pci_address_t EXPORT_FUNC(grub_pci_make_address) (grub_pci_device_t dev,
void EXPORT_FUNC(grub_pci_iterate) (grub_pci_iteratefunc_t hook,
void *hook_data);
struct grub_pci_dma_chunk;
struct grub_pci_dma_chunk *EXPORT_FUNC(grub_memalign_dma32) (grub_size_t align,
grub_size_t size);
void EXPORT_FUNC(grub_dma_free) (struct grub_pci_dma_chunk *ch);
volatile void *EXPORT_FUNC(grub_dma_get_virt) (struct grub_pci_dma_chunk *ch);
grub_uint32_t EXPORT_FUNC(grub_dma_get_phys) (struct grub_pci_dma_chunk *ch);
static inline void *
grub_dma_phys2virt (grub_uint32_t phys, struct grub_pci_dma_chunk *chunk)
{
return ((grub_uint8_t *) grub_dma_get_virt (chunk)
+ (phys - grub_dma_get_phys (chunk)));
}
static inline grub_uint32_t
grub_dma_virt2phys (volatile void *virt, struct grub_pci_dma_chunk *chunk)
{
return (((grub_uint8_t *) virt - (grub_uint8_t *) grub_dma_get_virt (chunk))
+ grub_dma_get_phys (chunk));
}
#include <grub/dma.h>
grub_uint8_t
EXPORT_FUNC (grub_pci_find_capability) (grub_pci_device_t dev, grub_uint8_t cap);