2 * Copyright 2016 Texas Instruments, Inc.
4 * SPDX-License-Identifier: GPL-2.0+
9 #include <fdt_support.h>
12 #include <asm/omap_common.h>
13 #include <asm/arch-omap5/sys_proto.h>
15 #ifdef CONFIG_TI_SECURE_DEVICE
17 /* Give zero values if not already defined */
18 #ifndef TI_OMAP5_SECURE_BOOT_RESV_SRAM_SZ
19 #define TI_OMAP5_SECURE_BOOT_RESV_SRAM_SZ (0)
21 #ifndef CONFIG_SECURE_RUNTIME_RESV_SRAM_SZ
22 #define CONFIG_SECURE_RUNTIME_RESV_SRAM_SZ (0)
25 static u32 hs_irq_skip[] = {
26 8, /* Secure violation reporting interrupt */
27 15, /* One interrupt for SDMA by secure world */
28 118 /* One interrupt for Crypto DMA by secure world */
31 static int ft_hs_fixup_crossbar(void *fdt, bd_t *bd)
36 int len, i, old_cnt, new_cnt;
41 * Increase the size of the fdt
42 * so we have some breathing room
44 ret = fdt_increase_size(fdt, 512);
46 printf("Could not increase size of device tree: %s\n",
51 /* Reserve IRQs that are used/needed by secure world */
52 path = "/ocp/crossbar";
53 offs = fdt_path_offset(fdt, path);
55 debug("Node %s not found.\n", path);
59 /* Get current entries */
60 p_data = fdt_getprop(fdt, offs, "ti,irqs-skip", &len);
62 old_cnt = len / sizeof(u32);
66 new_cnt = sizeof(hs_irq_skip) /
67 sizeof(hs_irq_skip[0]);
69 /* Create new/updated skip list for HS parts */
70 temp = malloc(sizeof(u32) * (old_cnt + new_cnt));
71 for (i = 0; i < new_cnt; i++)
72 temp[i] = cpu_to_fdt32(hs_irq_skip[i]);
73 for (i = 0; i < old_cnt; i++)
74 temp[i + new_cnt] = p_data[i];
76 /* Blow away old data and set new data */
77 fdt_delprop(fdt, offs, "ti,irqs-skip");
78 ret = fdt_setprop(fdt, offs, "ti,irqs-skip",
80 (old_cnt + new_cnt) * sizeof(u32));
83 /* Check if the update worked */
85 printf("Could not add ti,irqs-skip property to node %s: %s\n",
86 path, fdt_strerror(ret));
93 static int ft_hs_disable_rng(void *fdt, bd_t *bd)
99 /* Make HW RNG reserved for secure world use */
101 offs = fdt_path_offset(fdt, path);
103 debug("Node %s not found.\n", path);
106 ret = fdt_setprop_string(fdt, offs,
107 "status", "disabled");
109 printf("Could not add status property to node %s: %s\n",
110 path, fdt_strerror(ret));
116 #if ((TI_OMAP5_SECURE_BOOT_RESV_SRAM_SZ != 0) || \
117 (CONFIG_SECURE_RUNTIME_RESV_SRAM_SZ != 0))
118 static int ft_hs_fixup_sram(void *fdt, bd_t *bd)
126 * Update SRAM reservations on secure devices. The OCMC RAM
127 * is always reserved for secure use from the start of that
130 path = "/ocp/ocmcram@40300000/sram-hs";
131 offs = fdt_path_offset(fdt, path);
133 debug("Node %s not found.\n", path);
137 /* relative start offset */
138 temp[0] = cpu_to_fdt32(0);
139 /* reservation size */
140 temp[1] = cpu_to_fdt32(max(TI_OMAP5_SECURE_BOOT_RESV_SRAM_SZ,
141 CONFIG_SECURE_RUNTIME_RESV_SRAM_SZ));
142 fdt_delprop(fdt, offs, "reg");
143 ret = fdt_setprop(fdt, offs, "reg", temp, 2 * sizeof(u32));
145 printf("Could not add reg property to node %s: %s\n",
146 path, fdt_strerror(ret));
153 static int ft_hs_fixup_sram(void *fdt, bd_t *bd) { return 0; }
156 static void ft_hs_fixups(void *fdt, bd_t *bd)
158 /* Check we are running on an HS/EMU device type */
159 if (GP_DEVICE != get_device_type()) {
160 if ((ft_hs_fixup_crossbar(fdt, bd) == 0) &&
161 (ft_hs_disable_rng(fdt, bd) == 0) &&
162 (ft_hs_fixup_sram(fdt, bd) == 0))
165 printf("ERROR: Incorrect device type (GP) detected!");
167 /* Fixup failed or wrong device type */
171 static void ft_hs_fixups(void *fdt, bd_t *bd)
177 * Place for general cpu/SoC FDT fixups. Board specific
178 * fixups should remain in the board files which is where
179 * this function should be called from.
181 void ft_cpu_setup(void *fdt, bd_t *bd)
183 ft_hs_fixups(fdt, bd);