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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 • committed by Vincent Batts
parent 5e1a343a37
commit d4529d5d02
8 changed files with 155 additions and 25 deletions
Download patch file Download diff file Expand all files Collapse all files

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;
}