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-rw-r--r--recipes/linux/linux-omap-2.6.31/dss2/0004-OMAP-Add-VRAM-manager.patch854
1 files changed, 854 insertions, 0 deletions
diff --git a/recipes/linux/linux-omap-2.6.31/dss2/0004-OMAP-Add-VRAM-manager.patch b/recipes/linux/linux-omap-2.6.31/dss2/0004-OMAP-Add-VRAM-manager.patch
new file mode 100644
index 0000000000..13fe0b0234
--- /dev/null
+++ b/recipes/linux/linux-omap-2.6.31/dss2/0004-OMAP-Add-VRAM-manager.patch
@@ -0,0 +1,854 @@
+From cb8ce54283e64bd30636b7bcd2d7bb4e200825d2 Mon Sep 17 00:00:00 2001
+From: Tomi Valkeinen <tomi.valkeinen@nokia.com>
+Date: Fri, 7 Aug 2009 12:01:55 +0300
+Subject: [PATCH 04/18] OMAP: Add VRAM manager
+
+Add a Video RAM manager for OMAP 2 and 3 platforms. VRAM manager is used
+to allocate large continuous blocks of SDRAM or SRAM. The features VRAM
+manager has that are missing from dma_alloc_* functions are:
+
+- Support for OMAP2's SRAM
+- Allocate without ioremapping
+- Allocate at defined physical addresses
+- Allows larger VRAM area and larger allocations
+
+The upcoming DSS2 uses VRAM manager.
+
+VRAM area size can be defined in kernel config, board file or with
+kernel boot parameters. Board file definition overrides kernel config,
+and boot parameter overrides kernel config and board file.
+
+Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
+---
+ arch/arm/mach-omap2/io.c | 2 +
+ arch/arm/plat-omap/include/mach/vram.h | 63 +++
+ arch/arm/plat-omap/sram.c | 8 +
+ drivers/video/Kconfig | 1 +
+ drivers/video/Makefile | 1 +
+ drivers/video/omap2/Kconfig | 2 +
+ drivers/video/omap2/Makefile | 1 +
+ drivers/video/omap2/vram.c | 655 ++++++++++++++++++++++++++++++++
+ 8 files changed, 733 insertions(+), 0 deletions(-)
+ create mode 100644 arch/arm/plat-omap/include/mach/vram.h
+ create mode 100644 drivers/video/omap2/Kconfig
+ create mode 100644 drivers/video/omap2/Makefile
+ create mode 100644 drivers/video/omap2/vram.c
+
+diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
+index 49199a3..f837063 100644
+--- a/arch/arm/mach-omap2/io.c
++++ b/arch/arm/mach-omap2/io.c
+@@ -32,6 +32,7 @@
+ #include <mach/sram.h>
+ #include <mach/sdrc.h>
+ #include <mach/gpmc.h>
++#include <mach/vram.h>
+
+ #ifndef CONFIG_ARCH_OMAP4 /* FIXME: Remove this once clkdev is ready */
+ #include "clock.h"
+@@ -240,6 +241,7 @@ void __init omap2_map_common_io(void)
+ omap2_check_revision();
+ omap_sram_init();
+ omapfb_reserve_sdram();
++ omap_vram_reserve_sdram();
+ }
+
+ /*
+diff --git a/arch/arm/plat-omap/include/mach/vram.h b/arch/arm/plat-omap/include/mach/vram.h
+new file mode 100644
+index 0000000..fe72f81
+--- /dev/null
++++ b/arch/arm/plat-omap/include/mach/vram.h
+@@ -0,0 +1,63 @@
++/*
++ * VRAM manager for OMAP
++ *
++ * Copyright (C) 2009 Nokia Corporation
++ * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ * 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.,
++ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
++ */
++
++#ifndef __OMAP_VRAM_H__
++#define __OMAP_VRAM_H__
++
++#include <linux/autoconf.h>
++#include <linux/types.h>
++
++#define OMAP_VRAM_MEMTYPE_SDRAM 0
++#define OMAP_VRAM_MEMTYPE_SRAM 1
++#define OMAP_VRAM_MEMTYPE_MAX 1
++
++extern int omap_vram_add_region(unsigned long paddr, size_t size);
++extern int omap_vram_free(unsigned long paddr, size_t size);
++extern int omap_vram_alloc(int mtype, size_t size, unsigned long *paddr);
++extern int omap_vram_reserve(unsigned long paddr, size_t size);
++extern void omap_vram_get_info(unsigned long *vram, unsigned long *free_vram,
++ unsigned long *largest_free_block);
++
++#ifdef CONFIG_OMAP2_VRAM
++extern void omap_vram_set_sdram_vram(u32 size, u32 start);
++extern void omap_vram_set_sram_vram(u32 size, u32 start);
++
++extern void omap_vram_reserve_sdram(void);
++extern unsigned long omap_vram_reserve_sram(unsigned long sram_pstart,
++ unsigned long sram_vstart,
++ unsigned long sram_size,
++ unsigned long pstart_avail,
++ unsigned long size_avail);
++#else
++static inline void omap_vram_set_sdram_vram(u32 size, u32 start) { }
++static inline void omap_vram_set_sram_vram(u32 size, u32 start) { }
++
++static inline void omap_vram_reserve_sdram(void) { }
++static inline unsigned long omap_vram_reserve_sram(unsigned long sram_pstart,
++ unsigned long sram_vstart,
++ unsigned long sram_size,
++ unsigned long pstart_avail,
++ unsigned long size_avail)
++{
++ return 0;
++}
++#endif
++
++#endif
+diff --git a/arch/arm/plat-omap/sram.c b/arch/arm/plat-omap/sram.c
+index 5eae787..c9b89cd 100644
+--- a/arch/arm/plat-omap/sram.c
++++ b/arch/arm/plat-omap/sram.c
+@@ -28,6 +28,7 @@
+ #include <mach/sram.h>
+ #include <mach/board.h>
+ #include <mach/cpu.h>
++#include <mach/vram.h>
+
+ #include <mach/control.h>
+
+@@ -185,6 +186,13 @@ void __init omap_detect_sram(void)
+ omap_sram_start + SRAM_BOOTLOADER_SZ,
+ omap_sram_size - SRAM_BOOTLOADER_SZ);
+ omap_sram_size -= reserved;
++
++ reserved = omap_vram_reserve_sram(omap_sram_start, omap_sram_base,
++ omap_sram_size,
++ omap_sram_start + SRAM_BOOTLOADER_SZ,
++ omap_sram_size - SRAM_BOOTLOADER_SZ);
++ omap_sram_size -= reserved;
++
+ omap_sram_ceil = omap_sram_base + omap_sram_size;
+ }
+
+diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
+index 3b54b39..e09367a 100644
+--- a/drivers/video/Kconfig
++++ b/drivers/video/Kconfig
+@@ -2149,6 +2149,7 @@ config FB_BROADSHEET
+ a bridge adapter.
+
+ source "drivers/video/omap/Kconfig"
++source "drivers/video/omap2/Kconfig"
+
+ source "drivers/video/backlight/Kconfig"
+ source "drivers/video/display/Kconfig"
+diff --git a/drivers/video/Makefile b/drivers/video/Makefile
+index 01a819f..cc7f5c8 100644
+--- a/drivers/video/Makefile
++++ b/drivers/video/Makefile
+@@ -123,6 +123,7 @@ obj-$(CONFIG_FB_SM501) += sm501fb.o
+ obj-$(CONFIG_FB_XILINX) += xilinxfb.o
+ obj-$(CONFIG_FB_SH_MOBILE_LCDC) += sh_mobile_lcdcfb.o
+ obj-$(CONFIG_FB_OMAP) += omap/
++obj-y += omap2/
+ obj-$(CONFIG_XEN_FBDEV_FRONTEND) += xen-fbfront.o
+ obj-$(CONFIG_FB_CARMINE) += carminefb.o
+ obj-$(CONFIG_FB_MB862XX) += mb862xx/
+diff --git a/drivers/video/omap2/Kconfig b/drivers/video/omap2/Kconfig
+new file mode 100644
+index 0000000..7a6c4c9
+--- /dev/null
++++ b/drivers/video/omap2/Kconfig
+@@ -0,0 +1,2 @@
++config OMAP2_VRAM
++ bool
+diff --git a/drivers/video/omap2/Makefile b/drivers/video/omap2/Makefile
+new file mode 100644
+index 0000000..7fdf7bd
+--- /dev/null
++++ b/drivers/video/omap2/Makefile
+@@ -0,0 +1 @@
++obj-$(CONFIG_OMAP2_VRAM) += vram.o
+diff --git a/drivers/video/omap2/vram.c b/drivers/video/omap2/vram.c
+new file mode 100644
+index 0000000..634ce23
+--- /dev/null
++++ b/drivers/video/omap2/vram.c
+@@ -0,0 +1,655 @@
++/*
++ * VRAM manager for OMAP
++ *
++ * Copyright (C) 2009 Nokia Corporation
++ * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ * 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.,
++ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
++ */
++
++/*#define DEBUG*/
++
++#include <linux/kernel.h>
++#include <linux/mm.h>
++#include <linux/list.h>
++#include <linux/seq_file.h>
++#include <linux/bootmem.h>
++#include <linux/completion.h>
++#include <linux/debugfs.h>
++#include <linux/jiffies.h>
++#include <linux/module.h>
++
++#include <asm/setup.h>
++
++#include <mach/sram.h>
++#include <mach/vram.h>
++#include <mach/dma.h>
++
++#ifdef DEBUG
++#define DBG(format, ...) pr_debug("VRAM: " format, ## __VA_ARGS__)
++#else
++#define DBG(format, ...)
++#endif
++
++#define OMAP2_SRAM_START 0x40200000
++/* Maximum size, in reality this is smaller if SRAM is partially locked. */
++#define OMAP2_SRAM_SIZE 0xa0000 /* 640k */
++
++/* postponed regions are used to temporarily store region information at boot
++ * time when we cannot yet allocate the region list */
++#define MAX_POSTPONED_REGIONS 10
++
++static bool vram_initialized;
++static int postponed_cnt;
++static struct {
++ unsigned long paddr;
++ size_t size;
++} postponed_regions[MAX_POSTPONED_REGIONS];
++
++struct vram_alloc {
++ struct list_head list;
++ unsigned long paddr;
++ unsigned pages;
++};
++
++struct vram_region {
++ struct list_head list;
++ struct list_head alloc_list;
++ unsigned long paddr;
++ unsigned pages;
++};
++
++static DEFINE_MUTEX(region_mutex);
++static LIST_HEAD(region_list);
++
++static inline int region_mem_type(unsigned long paddr)
++{
++ if (paddr >= OMAP2_SRAM_START &&
++ paddr < OMAP2_SRAM_START + OMAP2_SRAM_SIZE)
++ return OMAP_VRAM_MEMTYPE_SRAM;
++ else
++ return OMAP_VRAM_MEMTYPE_SDRAM;
++}
++
++static struct vram_region *omap_vram_create_region(unsigned long paddr,
++ unsigned pages)
++{
++ struct vram_region *rm;
++
++ rm = kzalloc(sizeof(*rm), GFP_KERNEL);
++
++ if (rm) {
++ INIT_LIST_HEAD(&rm->alloc_list);
++ rm->paddr = paddr;
++ rm->pages = pages;
++ }
++
++ return rm;
++}
++
++#if 0
++static void omap_vram_free_region(struct vram_region *vr)
++{
++ list_del(&vr->list);
++ kfree(vr);
++}
++#endif
++
++static struct vram_alloc *omap_vram_create_allocation(struct vram_region *vr,
++ unsigned long paddr, unsigned pages)
++{
++ struct vram_alloc *va;
++ struct vram_alloc *new;
++
++ new = kzalloc(sizeof(*va), GFP_KERNEL);
++
++ if (!new)
++ return NULL;
++
++ new->paddr = paddr;
++ new->pages = pages;
++
++ list_for_each_entry(va, &vr->alloc_list, list) {
++ if (va->paddr > new->paddr)
++ break;
++ }
++
++ list_add_tail(&new->list, &va->list);
++
++ return new;
++}
++
++static void omap_vram_free_allocation(struct vram_alloc *va)
++{
++ list_del(&va->list);
++ kfree(va);
++}
++
++int omap_vram_add_region(unsigned long paddr, size_t size)
++{
++ struct vram_region *rm;
++ unsigned pages;
++
++ if (vram_initialized) {
++ DBG("adding region paddr %08lx size %d\n",
++ paddr, size);
++
++ size &= PAGE_MASK;
++ pages = size >> PAGE_SHIFT;
++
++ rm = omap_vram_create_region(paddr, pages);
++ if (rm == NULL)
++ return -ENOMEM;
++
++ list_add(&rm->list, &region_list);
++ } else {
++ if (postponed_cnt == MAX_POSTPONED_REGIONS)
++ return -ENOMEM;
++
++ postponed_regions[postponed_cnt].paddr = paddr;
++ postponed_regions[postponed_cnt].size = size;
++
++ ++postponed_cnt;
++ }
++ return 0;
++}
++
++int omap_vram_free(unsigned long paddr, size_t size)
++{
++ struct vram_region *rm;
++ struct vram_alloc *alloc;
++ unsigned start, end;
++
++ DBG("free mem paddr %08lx size %d\n", paddr, size);
++
++ size = PAGE_ALIGN(size);
++
++ mutex_lock(&region_mutex);
++
++ list_for_each_entry(rm, &region_list, list) {
++ list_for_each_entry(alloc, &rm->alloc_list, list) {
++ start = alloc->paddr;
++ end = alloc->paddr + (alloc->pages >> PAGE_SHIFT);
++
++ if (start >= paddr && end < paddr + size)
++ goto found;
++ }
++ }
++
++ mutex_unlock(&region_mutex);
++ return -EINVAL;
++
++found:
++ omap_vram_free_allocation(alloc);
++
++ mutex_unlock(&region_mutex);
++ return 0;
++}
++EXPORT_SYMBOL(omap_vram_free);
++
++static int _omap_vram_reserve(unsigned long paddr, unsigned pages)
++{
++ struct vram_region *rm;
++ struct vram_alloc *alloc;
++ size_t size;
++
++ size = pages << PAGE_SHIFT;
++
++ list_for_each_entry(rm, &region_list, list) {
++ unsigned long start, end;
++
++ DBG("checking region %lx %d\n", rm->paddr, rm->pages);
++
++ if (region_mem_type(rm->paddr) != region_mem_type(paddr))
++ continue;
++
++ start = rm->paddr;
++ end = start + (rm->pages << PAGE_SHIFT) - 1;
++ if (start > paddr || end < paddr + size - 1)
++ continue;
++
++ DBG("block ok, checking allocs\n");
++
++ list_for_each_entry(alloc, &rm->alloc_list, list) {
++ end = alloc->paddr - 1;
++
++ if (start <= paddr && end >= paddr + size - 1)
++ goto found;
++
++ start = alloc->paddr + (alloc->pages << PAGE_SHIFT);
++ }
++
++ end = rm->paddr + (rm->pages << PAGE_SHIFT) - 1;
++
++ if (!(start <= paddr && end >= paddr + size - 1))
++ continue;
++found:
++ DBG("found area start %lx, end %lx\n", start, end);
++
++ if (omap_vram_create_allocation(rm, paddr, pages) == NULL)
++ return -ENOMEM;
++
++ return 0;
++ }
++
++ return -ENOMEM;
++}
++
++int omap_vram_reserve(unsigned long paddr, size_t size)
++{
++ unsigned pages;
++ int r;
++
++ DBG("reserve mem paddr %08lx size %d\n", paddr, size);
++
++ size = PAGE_ALIGN(size);
++ pages = size >> PAGE_SHIFT;
++
++ mutex_lock(&region_mutex);
++
++ r = _omap_vram_reserve(paddr, pages);
++
++ mutex_unlock(&region_mutex);
++
++ return r;
++}
++EXPORT_SYMBOL(omap_vram_reserve);
++
++static void _omap_vram_dma_cb(int lch, u16 ch_status, void *data)
++{
++ struct completion *compl = data;
++ complete(compl);
++}
++
++static int _omap_vram_clear(u32 paddr, unsigned pages)
++{
++ struct completion compl;
++ unsigned elem_count;
++ unsigned frame_count;
++ int r;
++ int lch;
++
++ init_completion(&compl);
++
++ r = omap_request_dma(OMAP_DMA_NO_DEVICE, "VRAM DMA",
++ _omap_vram_dma_cb,
++ &compl, &lch);
++ if (r) {
++ pr_err("VRAM: request_dma failed for memory clear\n");
++ return -EBUSY;
++ }
++
++ elem_count = pages * PAGE_SIZE / 4;
++ frame_count = 1;
++
++ omap_set_dma_transfer_params(lch, OMAP_DMA_DATA_TYPE_S32,
++ elem_count, frame_count,
++ OMAP_DMA_SYNC_ELEMENT,
++ 0, 0);
++
++ omap_set_dma_dest_params(lch, 0, OMAP_DMA_AMODE_POST_INC,
++ paddr, 0, 0);
++
++ omap_set_dma_color_mode(lch, OMAP_DMA_CONSTANT_FILL, 0x000000);
++
++ omap_start_dma(lch);
++
++ if (wait_for_completion_timeout(&compl, msecs_to_jiffies(1000)) == 0) {
++ omap_stop_dma(lch);
++ pr_err("VRAM: dma timeout while clearing memory\n");
++ r = -EIO;
++ goto err;
++ }
++
++ r = 0;
++err:
++ omap_free_dma(lch);
++
++ return r;
++}
++
++static int _omap_vram_alloc(int mtype, unsigned pages, unsigned long *paddr)
++{
++ struct vram_region *rm;
++ struct vram_alloc *alloc;
++
++ list_for_each_entry(rm, &region_list, list) {
++ unsigned long start, end;
++
++ DBG("checking region %lx %d\n", rm->paddr, rm->pages);
++
++ if (region_mem_type(rm->paddr) != mtype)
++ continue;
++
++ start = rm->paddr;
++
++ list_for_each_entry(alloc, &rm->alloc_list, list) {
++ end = alloc->paddr;
++
++ if (end - start >= pages << PAGE_SHIFT)
++ goto found;
++
++ start = alloc->paddr + (alloc->pages << PAGE_SHIFT);
++ }
++
++ end = rm->paddr + (rm->pages << PAGE_SHIFT);
++found:
++ if (end - start < pages << PAGE_SHIFT)
++ continue;
++
++ DBG("found %lx, end %lx\n", start, end);
++
++ alloc = omap_vram_create_allocation(rm, start, pages);
++ if (alloc == NULL)
++ return -ENOMEM;
++
++ *paddr = start;
++
++ _omap_vram_clear(start, pages);
++
++ return 0;
++ }
++
++ return -ENOMEM;
++}
++
++int omap_vram_alloc(int mtype, size_t size, unsigned long *paddr)
++{
++ unsigned pages;
++ int r;
++
++ BUG_ON(mtype > OMAP_VRAM_MEMTYPE_MAX || !size);
++
++ DBG("alloc mem type %d size %d\n", mtype, size);
++
++ size = PAGE_ALIGN(size);
++ pages = size >> PAGE_SHIFT;
++
++ mutex_lock(&region_mutex);
++
++ r = _omap_vram_alloc(mtype, pages, paddr);
++
++ mutex_unlock(&region_mutex);
++
++ return r;
++}
++EXPORT_SYMBOL(omap_vram_alloc);
++
++void omap_vram_get_info(unsigned long *vram,
++ unsigned long *free_vram,
++ unsigned long *largest_free_block)
++{
++ struct vram_region *vr;
++ struct vram_alloc *va;
++
++ *vram = 0;
++ *free_vram = 0;
++ *largest_free_block = 0;
++
++ mutex_lock(&region_mutex);
++
++ list_for_each_entry(vr, &region_list, list) {
++ unsigned free;
++ unsigned long pa;
++
++ pa = vr->paddr;
++ *vram += vr->pages << PAGE_SHIFT;
++
++ list_for_each_entry(va, &vr->alloc_list, list) {
++ free = va->paddr - pa;
++ *free_vram += free;
++ if (free > *largest_free_block)
++ *largest_free_block = free;
++ pa = va->paddr + (va->pages << PAGE_SHIFT);
++ }
++
++ free = vr->paddr + (vr->pages << PAGE_SHIFT) - pa;
++ *free_vram += free;
++ if (free > *largest_free_block)
++ *largest_free_block = free;
++ }
++
++ mutex_unlock(&region_mutex);
++}
++EXPORT_SYMBOL(omap_vram_get_info);
++
++#if defined(CONFIG_DEBUG_FS)
++static int vram_debug_show(struct seq_file *s, void *unused)
++{
++ struct vram_region *vr;
++ struct vram_alloc *va;
++ unsigned size;
++
++ mutex_lock(&region_mutex);
++
++ list_for_each_entry(vr, &region_list, list) {
++ size = vr->pages << PAGE_SHIFT;
++ seq_printf(s, "%08lx-%08lx (%d bytes)\n",
++ vr->paddr, vr->paddr + size - 1,
++ size);
++
++ list_for_each_entry(va, &vr->alloc_list, list) {
++ size = va->pages << PAGE_SHIFT;
++ seq_printf(s, " %08lx-%08lx (%d bytes)\n",
++ va->paddr, va->paddr + size - 1,
++ size);
++ }
++ }
++
++ mutex_unlock(&region_mutex);
++
++ return 0;
++}
++
++static int vram_debug_open(struct inode *inode, struct file *file)
++{
++ return single_open(file, vram_debug_show, inode->i_private);
++}
++
++static const struct file_operations vram_debug_fops = {
++ .open = vram_debug_open,
++ .read = seq_read,
++ .llseek = seq_lseek,
++ .release = single_release,
++};
++
++static int __init omap_vram_create_debugfs(void)
++{
++ struct dentry *d;
++
++ d = debugfs_create_file("vram", S_IRUGO, NULL,
++ NULL, &vram_debug_fops);
++ if (IS_ERR(d))
++ return PTR_ERR(d);
++
++ return 0;
++}
++#endif
++
++static __init int omap_vram_init(void)
++{
++ int i;
++
++ vram_initialized = 1;
++
++ for (i = 0; i < postponed_cnt; i++)
++ omap_vram_add_region(postponed_regions[i].paddr,
++ postponed_regions[i].size);
++
++#ifdef CONFIG_DEBUG_FS
++ if (omap_vram_create_debugfs())
++ pr_err("VRAM: Failed to create debugfs file\n");
++#endif
++
++ return 0;
++}
++
++arch_initcall(omap_vram_init);
++
++/* boottime vram alloc stuff */
++
++/* set from board file */
++static u32 omap_vram_sram_start __initdata;
++static u32 omap_vram_sram_size __initdata;
++
++/* set from board file */
++static u32 omap_vram_sdram_start __initdata;
++static u32 omap_vram_sdram_size __initdata;
++
++/* set from kernel cmdline */
++static u32 omap_vram_def_sdram_size __initdata;
++static u32 omap_vram_def_sdram_start __initdata;
++
++static void __init omap_vram_early_vram(char **p)
++{
++ omap_vram_def_sdram_size = memparse(*p, p);
++ if (**p == ',')
++ omap_vram_def_sdram_start = simple_strtoul((*p) + 1, p, 16);
++}
++__early_param("vram=", omap_vram_early_vram);
++
++/*
++ * Called from map_io. We need to call to this early enough so that we
++ * can reserve the fixed SDRAM regions before VM could get hold of them.
++ */
++void __init omap_vram_reserve_sdram(void)
++{
++ struct bootmem_data *bdata;
++ unsigned long sdram_start, sdram_size;
++ u32 paddr;
++ u32 size = 0;
++
++ /* cmdline arg overrides the board file definition */
++ if (omap_vram_def_sdram_size) {
++ size = omap_vram_def_sdram_size;
++ paddr = omap_vram_def_sdram_start;
++ }
++
++ if (!size) {
++ size = omap_vram_sdram_size;
++ paddr = omap_vram_sdram_start;
++ }
++
++#ifdef CONFIG_OMAP2_VRAM_SIZE
++ if (!size) {
++ size = CONFIG_OMAP2_VRAM_SIZE * 1024 * 1024;
++ paddr = 0;
++ }
++#endif
++
++ if (!size)
++ return;
++
++ size = PAGE_ALIGN(size);
++
++ bdata = NODE_DATA(0)->bdata;
++ sdram_start = bdata->node_min_pfn << PAGE_SHIFT;
++ sdram_size = (bdata->node_low_pfn << PAGE_SHIFT) - sdram_start;
++
++ if (paddr) {
++ if ((paddr & ~PAGE_MASK) || paddr < sdram_start ||
++ paddr + size > sdram_start + sdram_size) {
++ pr_err("Illegal SDRAM region for VRAM\n");
++ return;
++ }
++
++ if (reserve_bootmem(paddr, size, BOOTMEM_EXCLUSIVE) < 0) {
++ pr_err("FB: failed to reserve VRAM\n");
++ return;
++ }
++ } else {
++ if (size > sdram_size) {
++ pr_err("Illegal SDRAM size for VRAM\n");
++ return;
++ }
++
++ paddr = virt_to_phys(alloc_bootmem_pages(size));
++ BUG_ON(paddr & ~PAGE_MASK);
++ }
++
++ omap_vram_add_region(paddr, size);
++
++ pr_info("Reserving %u bytes SDRAM for VRAM\n", size);
++}
++
++/*
++ * Called at sram init time, before anything is pushed to the SRAM stack.
++ * Because of the stack scheme, we will allocate everything from the
++ * start of the lowest address region to the end of SRAM. This will also
++ * include padding for page alignment and possible holes between regions.
++ *
++ * As opposed to the SDRAM case, we'll also do any dynamic allocations at
++ * this point, since the driver built as a module would have problem with
++ * freeing / reallocating the regions.
++ */
++unsigned long __init omap_vram_reserve_sram(unsigned long sram_pstart,
++ unsigned long sram_vstart,
++ unsigned long sram_size,
++ unsigned long pstart_avail,
++ unsigned long size_avail)
++{
++ unsigned long pend_avail;
++ unsigned long reserved;
++ u32 paddr;
++ u32 size;
++
++ paddr = omap_vram_sram_start;
++ size = omap_vram_sram_size;
++
++ if (!size)
++ return 0;
++
++ reserved = 0;
++ pend_avail = pstart_avail + size_avail;
++
++ if (!paddr) {
++ /* Dynamic allocation */
++ if ((size_avail & PAGE_MASK) < size) {
++ pr_err("Not enough SRAM for VRAM\n");
++ return 0;
++ }
++ size_avail = (size_avail - size) & PAGE_MASK;
++ paddr = pstart_avail + size_avail;
++ }
++
++ if (paddr < sram_pstart ||
++ paddr + size > sram_pstart + sram_size) {
++ pr_err("Illegal SRAM region for VRAM\n");
++ return 0;
++ }
++
++ /* Reserve everything above the start of the region. */
++ if (pend_avail - paddr > reserved)
++ reserved = pend_avail - paddr;
++ size_avail = pend_avail - reserved - pstart_avail;
++
++ omap_vram_add_region(paddr, size);
++
++ if (reserved)
++ pr_info("Reserving %lu bytes SRAM for VRAM\n", reserved);
++
++ return reserved;
++}
++
++void __init omap_vram_set_sdram_vram(u32 size, u32 start)
++{
++ omap_vram_sdram_start = start;
++ omap_vram_sdram_size = size;
++}
++
++void __init omap_vram_set_sram_vram(u32 size, u32 start)
++{
++ omap_vram_sram_start = start;
++ omap_vram_sram_size = size;
++}
+--
+1.6.2.4
+
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-27 13:37:11 +0000