2017-06-16 19:31:32 +00:00
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From 265292f2b0da0eb414c409871ba0f94a99ec33c1 Mon Sep 17 00:00:00 2001
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From: Vladimir Serbinenko <phcoder@gmail.com>
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Date: Mon, 8 May 2017 22:06:04 +0200
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2018-04-06 19:38:57 +00:00
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Subject: [PATCH 027/227] arm_coreboot: Support DMA.
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2017-06-16 19:31:32 +00:00
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This is needed to support USB and some other busses.
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---
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grub-core/Makefile.core.def | 1 +
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grub-core/kern/arm/cache.c | 34 ++++++++++++++++++++++
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grub-core/kern/arm/coreboot/dma.c | 59 +++++++++++++++++++++++++++++++++++++++
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include/grub/cache.h | 7 ++---
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include/grub/dma.h | 44 +++++++++++++++++++++++++++++
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include/grub/pci.h | 22 +--------------
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2018-02-27 18:56:41 +00:00
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grub-core/kern/arm/cache_armv7.S | 12 ++++++++
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grub-core/Makefile.am | 1 +
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2017-06-16 19:31:32 +00:00
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8 files changed, 155 insertions(+), 25 deletions(-)
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create mode 100644 grub-core/kern/arm/coreboot/dma.c
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create mode 100644 include/grub/dma.h
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diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
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2018-02-27 18:56:41 +00:00
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index 6be6e7f61ee..e4f253a205e 100644
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2017-06-16 19:31:32 +00:00
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--- a/grub-core/Makefile.core.def
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+++ b/grub-core/Makefile.core.def
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@@ -163,6 +163,7 @@ kernel = {
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arm_coreboot = term/ps2.c;
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arm_coreboot = term/arm/pl050.c;
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arm_coreboot = commands/keylayouts.c;
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+ arm_coreboot = kern/arm/coreboot/dma.c;
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terminfoinkernel = term/terminfo.c;
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terminfoinkernel = term/tparm.c;
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diff --git a/grub-core/kern/arm/cache.c b/grub-core/kern/arm/cache.c
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2018-02-27 18:56:41 +00:00
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index 34154ccdb0e..af1c4bbf544 100644
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2017-06-16 19:31:32 +00:00
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--- a/grub-core/kern/arm/cache.c
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+++ b/grub-core/kern/arm/cache.c
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@@ -29,6 +29,8 @@ void grub_arm_clean_dcache_range_armv6 (grub_addr_t start, grub_addr_t end,
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grub_addr_t dlinesz);
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void grub_arm_clean_dcache_range_armv7 (grub_addr_t start, grub_addr_t end,
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grub_addr_t dlinesz);
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+void grub_arm_clean_dcache_range_poc_armv7 (grub_addr_t start, grub_addr_t end,
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+ grub_addr_t dlinesz);
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void grub_arm_invalidate_icache_range_armv6 (grub_addr_t start, grub_addr_t end,
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grub_addr_t dlinesz);
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void grub_arm_invalidate_icache_range_armv7 (grub_addr_t start, grub_addr_t end,
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2018-01-17 20:40:19 +00:00
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@@ -252,6 +254,38 @@ grub_arch_sync_caches (void *address, grub_size_t len)
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}
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2017-06-16 19:31:32 +00:00
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}
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2018-01-17 20:40:19 +00:00
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+void
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2017-06-16 19:31:32 +00:00
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+grub_arch_sync_dma_caches (volatile void *address, grub_size_t len)
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+{
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+ grub_addr_t start = (grub_addr_t) address;
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+ grub_addr_t end = start + len;
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+
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+ if (type == ARCH_UNKNOWN)
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+ probe_caches ();
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+ start = ALIGN_DOWN (start, grub_arch_cache_max_linesz);
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+ end = ALIGN_UP (end, grub_arch_cache_max_linesz);
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+ switch (type)
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+ {
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+ case ARCH_ARMV6:
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+ grub_arm_clean_dcache_range_armv6 (start, end, grub_arch_cache_dlinesz);
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+ grub_arm_invalidate_icache_range_armv6 (start, end,
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+ grub_arch_cache_ilinesz);
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+ break;
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+ case ARCH_ARMV5_WRITE_THROUGH:
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+ case ARCH_ARMV6_UNIFIED:
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+ grub_arm_clean_dcache_range_armv6 (start, end, grub_arch_cache_dlinesz);
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+ break;
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+ case ARCH_ARMV7:
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+ grub_arm_clean_dcache_range_poc_armv7 (start, end, grub_arch_cache_dlinesz);
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+ grub_arm_invalidate_icache_range_armv7 (start, end,
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+ grub_arch_cache_ilinesz);
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+ break;
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+ /* Pacify GCC. */
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+ case ARCH_UNKNOWN:
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+ break;
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+ }
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+}
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+
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2018-01-17 20:40:19 +00:00
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void
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2017-06-16 19:31:32 +00:00
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grub_arm_disable_caches_mmu (void)
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{
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diff --git a/grub-core/kern/arm/coreboot/dma.c b/grub-core/kern/arm/coreboot/dma.c
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new file mode 100644
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2018-02-27 18:56:41 +00:00
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index 00000000000..2c2a6278904
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2017-06-16 19:31:32 +00:00
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--- /dev/null
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+++ b/grub-core/kern/arm/coreboot/dma.c
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@@ -0,0 +1,59 @@
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+/*
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+ * GRUB -- GRand Unified Bootloader
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+ * Copyright (C) 2007,2009 Free Software Foundation, Inc.
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+ *
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+ * GRUB is free software: you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation, either version 3 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * GRUB is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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+ */
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+
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+#include <grub/dl.h>
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+#include <grub/dma.h>
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+#include <grub/mm.h>
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+#include <grub/misc.h>
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+#include <grub/mm_private.h>
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+#include <grub/cache.h>
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+
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+struct grub_pci_dma_chunk *
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+grub_memalign_dma32 (grub_size_t align, grub_size_t size)
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+{
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+ void *ret;
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+ if (align < 64)
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+ align = 64;
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+ size = ALIGN_UP (size, align);
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+ ret = grub_memalign (align, size);
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+ if (!ret)
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+ return 0;
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+ grub_arch_sync_dma_caches (ret, size);
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+ return ret;
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+}
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+
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+void
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+grub_dma_free (struct grub_pci_dma_chunk *ch)
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+{
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+ grub_size_t size = (((struct grub_mm_header *) ch) - 1)->size * GRUB_MM_ALIGN;
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+ grub_arch_sync_dma_caches (ch, size);
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+ grub_free (ch);
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+}
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+
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+volatile void *
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+grub_dma_get_virt (struct grub_pci_dma_chunk *ch)
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+{
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+ return (void *) ch;
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+}
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+
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+grub_uint32_t
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+grub_dma_get_phys (struct grub_pci_dma_chunk *ch)
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+{
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+ return (grub_uint32_t) (grub_addr_t) ch;
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+}
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+
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diff --git a/include/grub/cache.h b/include/grub/cache.h
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2018-02-27 18:56:41 +00:00
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index fc669dfd189..1c98ce270b6 100644
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2017-06-16 19:31:32 +00:00
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--- a/include/grub/cache.h
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+++ b/include/grub/cache.h
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@@ -34,15 +34,14 @@ void EXPORT_FUNC(grub_arch_sync_caches) (void *address, grub_size_t len);
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#endif
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#ifndef GRUB_MACHINE_EMU
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-#ifdef _mips
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-void EXPORT_FUNC(grub_arch_sync_dma_caches) (volatile void *address,
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- grub_size_t len);
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-#else
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+#if defined (__i386__) || defined (__x86_64__)
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static inline void
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grub_arch_sync_dma_caches (volatile void *address __attribute__ ((unused)),
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grub_size_t len __attribute__ ((unused)))
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{
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}
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+#else
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+void EXPORT_FUNC(grub_arch_sync_dma_caches) (volatile void *address, grub_size_t len);
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#endif
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#endif
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diff --git a/include/grub/dma.h b/include/grub/dma.h
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new file mode 100644
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2018-02-27 18:56:41 +00:00
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index 00000000000..19992ebc131
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2017-06-16 19:31:32 +00:00
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--- /dev/null
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+++ b/include/grub/dma.h
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@@ -0,0 +1,44 @@
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+/*
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+ * GRUB -- GRand Unified Bootloader
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+ * Copyright (C) 2008,2009 Free Software Foundation, Inc.
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+ *
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+ * GRUB is free software: you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation, either version 3 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * GRUB is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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+ */
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+
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+#ifndef GRUB_DMA_H
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+#define GRUB_DMA_H 1
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+
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+struct grub_pci_dma_chunk;
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+
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+struct grub_pci_dma_chunk *EXPORT_FUNC(grub_memalign_dma32) (grub_size_t align,
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+ grub_size_t size);
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+void EXPORT_FUNC(grub_dma_free) (struct grub_pci_dma_chunk *ch);
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+volatile void *EXPORT_FUNC(grub_dma_get_virt) (struct grub_pci_dma_chunk *ch);
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+grub_uint32_t EXPORT_FUNC(grub_dma_get_phys) (struct grub_pci_dma_chunk *ch);
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+
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+static inline void *
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+grub_dma_phys2virt (grub_uint32_t phys, struct grub_pci_dma_chunk *chunk)
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+{
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+ return ((grub_uint8_t *) grub_dma_get_virt (chunk)
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+ + (phys - grub_dma_get_phys (chunk)));
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+}
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+
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+static inline grub_uint32_t
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+grub_dma_virt2phys (volatile void *virt, struct grub_pci_dma_chunk *chunk)
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+{
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+ return (((grub_uint8_t *) virt - (grub_uint8_t *) grub_dma_get_virt (chunk))
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+ + grub_dma_get_phys (chunk));
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+}
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+
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+#endif
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diff --git a/include/grub/pci.h b/include/grub/pci.h
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2018-02-27 18:56:41 +00:00
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index 70d9a05131b..262c89b748b 100644
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2017-06-16 19:31:32 +00:00
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--- a/include/grub/pci.h
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+++ b/include/grub/pci.h
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@@ -142,27 +142,7 @@ grub_pci_address_t EXPORT_FUNC(grub_pci_make_address) (grub_pci_device_t dev,
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void EXPORT_FUNC(grub_pci_iterate) (grub_pci_iteratefunc_t hook,
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void *hook_data);
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-struct grub_pci_dma_chunk;
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-
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-struct grub_pci_dma_chunk *EXPORT_FUNC(grub_memalign_dma32) (grub_size_t align,
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- grub_size_t size);
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-void EXPORT_FUNC(grub_dma_free) (struct grub_pci_dma_chunk *ch);
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-volatile void *EXPORT_FUNC(grub_dma_get_virt) (struct grub_pci_dma_chunk *ch);
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-grub_uint32_t EXPORT_FUNC(grub_dma_get_phys) (struct grub_pci_dma_chunk *ch);
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-
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-static inline void *
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-grub_dma_phys2virt (grub_uint32_t phys, struct grub_pci_dma_chunk *chunk)
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-{
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- return ((grub_uint8_t *) grub_dma_get_virt (chunk)
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- + (phys - grub_dma_get_phys (chunk)));
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-}
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-
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-static inline grub_uint32_t
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-grub_dma_virt2phys (volatile void *virt, struct grub_pci_dma_chunk *chunk)
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-{
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- return (((grub_uint8_t *) virt - (grub_uint8_t *) grub_dma_get_virt (chunk))
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- + grub_dma_get_phys (chunk));
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-}
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+#include <grub/dma.h>
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grub_uint8_t
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EXPORT_FUNC (grub_pci_find_capability) (grub_pci_device_t dev, grub_uint8_t cap);
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2018-02-27 18:56:41 +00:00
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diff --git a/grub-core/kern/arm/cache_armv7.S b/grub-core/kern/arm/cache_armv7.S
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index 1ef2754af8a..5ae76a3d819 100644
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--- a/grub-core/kern/arm/cache_armv7.S
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+++ b/grub-core/kern/arm/cache_armv7.S
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@@ -33,6 +33,18 @@
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# define ISB isb
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#define ARMV7 1
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+FUNCTION(grub_arm_clean_dcache_range_poc_armv7)
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+ DSB
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+ @ Clean data cache for range to point-of-coherence
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+1: cmp r0, r1
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+ bge 2f
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+ mcr p15, 0, r0, c7, c14, 1 @ DCCMVAC
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+ add r0, r0, r2 @ Next line
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+ b 1b
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+2: DSB
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+ bx lr
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+
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+
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@ r0 - CLIDR
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@ r1 - LoC
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@ r2 - current level
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diff --git a/grub-core/Makefile.am b/grub-core/Makefile.am
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index a2aaf9f54b0..10451384720 100644
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--- a/grub-core/Makefile.am
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+++ b/grub-core/Makefile.am
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@@ -248,6 +248,7 @@ KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/gfxterm.h
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KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/font.h
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KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/bufio.h
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KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/fdt.h
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+KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/dma.h
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KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/arm/coreboot/kernel.h
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KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/fdtbus.h
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endif
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2017-06-16 19:31:32 +00:00
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--
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2018-02-27 18:56:41 +00:00
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2.15.0
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2017-06-16 19:31:32 +00:00
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