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-rw-r--r--arch/arm/plat-omap/sram.c63
1 files changed, 13 insertions, 50 deletions
diff --git a/arch/arm/plat-omap/sram.c b/arch/arm/plat-omap/sram.c
index 7e5f8877e051..bc46f33aede3 100644
--- a/arch/arm/plat-omap/sram.c
+++ b/arch/arm/plat-omap/sram.c
@@ -51,10 +51,14 @@ static unsigned long omap_sram_base;
51static unsigned long omap_sram_size; 51static unsigned long omap_sram_size;
52static unsigned long omap_sram_ceil; 52static unsigned long omap_sram_ceil;
53 53
54int omap_fb_sram_plane = -1; 54extern unsigned long omapfb_reserve_sram(unsigned long sram_pstart,
55int omap_fb_sram_valid; 55 unsigned long sram_vstart,
56 unsigned long sram_size,
57 unsigned long pstart_avail,
58 unsigned long size_avail);
56 59
57/* Depending on the target RAMFS firewall setup, the public usable amount of 60/*
61 * Depending on the target RAMFS firewall setup, the public usable amount of
58 * SRAM varies. The default accessable size for all device types is 2k. A GP 62 * SRAM varies. The default accessable size for all device types is 2k. A GP
59 * device allows ARM11 but not other initators for full size. This 63 * device allows ARM11 but not other initators for full size. This
60 * functionality seems ok until some nice security API happens. 64 * functionality seems ok until some nice security API happens.
@@ -78,45 +82,6 @@ static int is_sram_locked(void)
78 return 1; /* assume locked with no PPA or security driver */ 82 return 1; /* assume locked with no PPA or security driver */
79} 83}
80 84
81static int get_fb_sram_conf(unsigned long start_avail, unsigned size_avail,
82 unsigned long *start, int *plane_idx)
83{
84 const struct omap_fbmem_config *fbmem_conf;
85 unsigned long size = 0;
86 int i;
87
88 i = 0;
89 *start = 0;
90 *plane_idx = -1;
91 while ((fbmem_conf = omap_get_nr_config(OMAP_TAG_FBMEM,
92 struct omap_fbmem_config, i)) != NULL) {
93 u32 paddr, end;
94
95 paddr = fbmem_conf->start;
96 end = fbmem_conf->start + fbmem_conf->size;
97 if (paddr > omap_sram_start &&
98 paddr < omap_sram_start + omap_sram_size) {
99 if (*plane_idx != -1 || paddr < start_avail ||
100 paddr == end ||
101 end > start_avail + size_avail) {
102 printk(KERN_ERR "invalid FB SRAM configuration");
103 *start = 0;
104 return -1;
105 }
106 *plane_idx = i;
107 *start = fbmem_conf->start;
108 size = fbmem_conf->size;
109 }
110 i++;
111 }
112
113 if (*plane_idx >= 0)
114 pr_info("Reserving %lu bytes SRAM frame buffer "
115 "for plane %d\n", size, *plane_idx);
116
117 return 0;
118}
119
120/* 85/*
121 * The amount of SRAM depends on the core type. 86 * The amount of SRAM depends on the core type.
122 * Note that we cannot try to test for SRAM here because writes 87 * Note that we cannot try to test for SRAM here because writes
@@ -125,7 +90,7 @@ static int get_fb_sram_conf(unsigned long start_avail, unsigned size_avail,
125 */ 90 */
126void __init omap_detect_sram(void) 91void __init omap_detect_sram(void)
127{ 92{
128 unsigned long fb_sram_start; 93 unsigned long reserved;
129 94
130 if (cpu_is_omap24xx()) { 95 if (cpu_is_omap24xx()) {
131 if (is_sram_locked()) { 96 if (is_sram_locked()) {
@@ -158,13 +123,11 @@ void __init omap_detect_sram(void)
158 omap_sram_size = 0x4000; 123 omap_sram_size = 0x4000;
159 } 124 }
160 } 125 }
161 if (get_fb_sram_conf(omap_sram_start + SRAM_BOOTLOADER_SZ, 126 reserved = omapfb_reserve_sram(omap_sram_start, omap_sram_base,
162 omap_sram_size - SRAM_BOOTLOADER_SZ, 127 omap_sram_size,
163 &fb_sram_start, &omap_fb_sram_plane) == 0) 128 omap_sram_start + SRAM_BOOTLOADER_SZ,
164 omap_fb_sram_valid = 1; 129 omap_sram_size - SRAM_BOOTLOADER_SZ);
165 if (omap_fb_sram_valid && omap_fb_sram_plane >= 0) 130 omap_sram_size -= reserved;
166 omap_sram_size -= omap_sram_start + omap_sram_size -
167 fb_sram_start;
168 omap_sram_ceil = omap_sram_base + omap_sram_size; 131 omap_sram_ceil = omap_sram_base + omap_sram_size;
169} 132}
170 133