1 /*
2 * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 #include <assert.h>
8 #include <stdbool.h>
9
10 #include <platform_def.h>
11
12 #include <arch_helpers.h>
13 #include <context.h>
14 #include <common/bl_common.h>
15 #include <common/debug.h>
16 #include <drivers/arm/cci.h>
17 #include <drivers/console.h>
18 #include <lib/el3_runtime/context_mgmt.h>
19 #include <lib/mmio.h>
20 #include <lib/xlat_tables/xlat_tables.h>
21 #include <plat/common/platform.h>
22
23 #include <imx8qm_pads.h>
24 #include <imx8_iomux.h>
25 #include <imx8_lpuart.h>
26 #include <plat_imx8.h>
27 #include <sci/sci.h>
28 #include <sec_rsrc.h>
29
30 static const unsigned long BL31_COHERENT_RAM_START = BL_COHERENT_RAM_BASE;
31 static const unsigned long BL31_COHERENT_RAM_END = BL_COHERENT_RAM_END;
32 static const unsigned long BL31_RO_START = BL_CODE_BASE;
33 static const unsigned long BL31_RO_END = BL_CODE_END;
34 static const unsigned long BL31_RW_END = BL_END;
35
36 IMPORT_SYM(unsigned long, __RW_START__, BL31_RW_START);
37
38 static entry_point_info_t bl32_image_ep_info;
39 static entry_point_info_t bl33_image_ep_info;
40
41 #define UART_PAD_CTRL (PADRING_IFMUX_EN_MASK | PADRING_GP_EN_MASK | \
42 (SC_PAD_CONFIG_OUT_IN << PADRING_CONFIG_SHIFT) | \
43 (SC_PAD_ISO_OFF << PADRING_LPCONFIG_SHIFT) | \
44 (SC_PAD_28FDSOI_DSE_DV_LOW << PADRING_DSE_SHIFT) | \
45 (SC_PAD_28FDSOI_PS_PD << PADRING_PULL_SHIFT))
46
47 const static int imx8qm_cci_map[] = {
48 CLUSTER0_CCI_SLVAE_IFACE,
49 CLUSTER1_CCI_SLVAE_IFACE
50 };
51
52 static const mmap_region_t imx_mmap[] = {
53 MAP_REGION_FLAT(IMX_REG_BASE, IMX_REG_SIZE, MT_DEVICE | MT_RW),
54 {0}
55 };
56
get_spsr_for_bl33_entry(void)57 static uint32_t get_spsr_for_bl33_entry(void)
58 {
59 unsigned long el_status;
60 unsigned long mode;
61 uint32_t spsr;
62
63 /* figure out what mode we enter the non-secure world */
64 el_status = read_id_aa64pfr0_el1() >> ID_AA64PFR0_EL2_SHIFT;
65 el_status &= ID_AA64PFR0_ELX_MASK;
66
67 mode = (el_status) ? MODE_EL2 : MODE_EL1;
68 spsr = SPSR_64(mode, MODE_SP_ELX, DISABLE_ALL_EXCEPTIONS);
69
70 return spsr;
71 }
72
73 #if DEBUG_CONSOLE_A53
lpuart32_serial_setbrg(unsigned int base,int baudrate)74 static void lpuart32_serial_setbrg(unsigned int base, int baudrate)
75 {
76 unsigned int sbr, osr, baud_diff, tmp_osr, tmp_sbr;
77 unsigned int diff1, diff2, tmp, rate;
78
79 if (baudrate == 0)
80 panic();
81
82 sc_pm_get_clock_rate(ipc_handle, SC_R_UART_0, 2, &rate);
83
84 baud_diff = baudrate;
85 osr = 0;
86 sbr = 0;
87 for (tmp_osr = 4; tmp_osr <= 32; tmp_osr++) {
88 tmp_sbr = (rate / (baudrate * tmp_osr));
89 if (tmp_sbr == 0)
90 tmp_sbr = 1;
91
92 /* calculate difference in actual baud w/ current values */
93 diff1 = rate / (tmp_osr * tmp_sbr) - baudrate;
94 diff2 = rate / (tmp_osr * (tmp_sbr + 1));
95
96 /* select best values between sbr and sbr+1 */
97 if (diff1 > (baudrate - diff2)) {
98 diff1 = baudrate - diff2;
99 tmp_sbr++;
100 }
101
102 if (diff1 <= baud_diff) {
103 baud_diff = diff1;
104 osr = tmp_osr;
105 sbr = tmp_sbr;
106 }
107 }
108
109 tmp = mmio_read_32(IMX_BOOT_UART_BASE + BAUD);
110
111 if ((osr > 3) && (osr < 8))
112 tmp |= LPUART_BAUD_BOTHEDGE_MASK;
113
114 tmp &= ~LPUART_BAUD_OSR_MASK;
115 tmp |= LPUART_BAUD_OSR(osr - 1);
116 tmp &= ~LPUART_BAUD_SBR_MASK;
117 tmp |= LPUART_BAUD_SBR(sbr);
118
119 /* explicitly disable 10 bit mode & set 1 stop bit */
120 tmp &= ~(LPUART_BAUD_M10_MASK | LPUART_BAUD_SBNS_MASK);
121
122 mmio_write_32(IMX_BOOT_UART_BASE + BAUD, tmp);
123 }
124
lpuart32_serial_init(unsigned int base)125 static int lpuart32_serial_init(unsigned int base)
126 {
127 unsigned int tmp;
128
129 /* disable TX & RX before enabling clocks */
130 tmp = mmio_read_32(IMX_BOOT_UART_BASE + CTRL);
131 tmp &= ~(CTRL_TE | CTRL_RE);
132 mmio_write_32(IMX_BOOT_UART_BASE + CTRL, tmp);
133
134 mmio_write_32(IMX_BOOT_UART_BASE + MODIR, 0);
135 mmio_write_32(IMX_BOOT_UART_BASE + FIFO, ~(FIFO_TXFE | FIFO_RXFE));
136
137 mmio_write_32(IMX_BOOT_UART_BASE + MATCH, 0);
138
139 /* provide data bits, parity, stop bit, etc */
140 lpuart32_serial_setbrg(base, IMX_BOOT_UART_BAUDRATE);
141
142 /* eight data bits no parity bit */
143 tmp = mmio_read_32(IMX_BOOT_UART_BASE + CTRL);
144 tmp &= ~(LPUART_CTRL_PE_MASK | LPUART_CTRL_PT_MASK | LPUART_CTRL_M_MASK);
145 mmio_write_32(IMX_BOOT_UART_BASE + CTRL, tmp);
146
147 mmio_write_32(IMX_BOOT_UART_BASE + CTRL, CTRL_RE | CTRL_TE);
148
149 mmio_write_32(IMX_BOOT_UART_BASE + DATA, 0x55);
150 mmio_write_32(IMX_BOOT_UART_BASE + DATA, 0x55);
151 mmio_write_32(IMX_BOOT_UART_BASE + DATA, 0x0A);
152
153 return 0;
154 }
155 #endif
156
mx8_partition_resources(void)157 void mx8_partition_resources(void)
158 {
159 sc_rm_pt_t secure_part, os_part;
160 sc_rm_mr_t mr, mr_record = 64;
161 sc_faddr_t start, end;
162 bool owned, owned2;
163 sc_err_t err;
164 int i;
165
166 err = sc_rm_get_partition(ipc_handle, &secure_part);
167
168 err = sc_rm_partition_alloc(ipc_handle, &os_part, false, false,
169 false, false, false);
170
171 err = sc_rm_set_parent(ipc_handle, os_part, secure_part);
172
173 /* set secure resources to NOT-movable */
174 for (i = 0; i < ARRAY_SIZE(secure_rsrcs); i++) {
175 err = sc_rm_set_resource_movable(ipc_handle, secure_rsrcs[i],
176 secure_rsrcs[i], false);
177 if (err)
178 ERROR("sc_rm_set_resource_movable: rsrc %u, ret %u\n",
179 secure_rsrcs[i], err);
180 }
181
182 owned = sc_rm_is_resource_owned(ipc_handle, SC_R_M4_0_PID0);
183 if (owned) {
184 err = sc_rm_set_resource_movable(ipc_handle, SC_R_M4_0_PID0,
185 SC_R_M4_0_PID0, false);
186 if (err)
187 ERROR("sc_rm_set_resource_movable: rsrc %u, ret %u\n",
188 SC_R_M4_0_PID0, err);
189 }
190
191 owned2 = sc_rm_is_resource_owned(ipc_handle, SC_R_M4_1_PID0);
192 if (owned2) {
193 err = sc_rm_set_resource_movable(ipc_handle, SC_R_M4_1_PID0,
194 SC_R_M4_1_PID0, false);
195 if (err)
196 ERROR("sc_rm_set_resource_movable: rsrc %u, ret %u\n",
197 SC_R_M4_1_PID0, err);
198 }
199 /* move all movable resources and pins to non-secure partition */
200 err = sc_rm_move_all(ipc_handle, secure_part, os_part, true, true);
201 if (err)
202 ERROR("sc_rm_move_all: %u\n", err);
203
204 /* iterate through peripherals to give NS OS part access */
205 for (i = 0; i < ARRAY_SIZE(ns_access_allowed); i++) {
206 err = sc_rm_set_peripheral_permissions(ipc_handle, ns_access_allowed[i],
207 os_part, SC_RM_PERM_FULL);
208 if (err)
209 ERROR("sc_rm_set_peripheral_permissions: rsrc %u, \
210 ret %u\n", ns_access_allowed[i], err);
211 }
212
213 if (owned) {
214 err = sc_rm_set_resource_movable(ipc_handle, SC_R_M4_0_PID0,
215 SC_R_M4_0_PID0, true);
216 if (err)
217 ERROR("sc_rm_set_resource_movable: rsrc %u, ret %u\n",
218 SC_R_M4_0_PID0, err);
219 err = sc_rm_assign_resource(ipc_handle, os_part, SC_R_M4_0_PID0);
220 if (err)
221 ERROR("sc_rm_assign_resource: rsrc %u, ret %u\n",
222 SC_R_M4_0_PID0, err);
223 }
224 if (owned2) {
225 err = sc_rm_set_resource_movable(ipc_handle, SC_R_M4_1_PID0,
226 SC_R_M4_1_PID0, true);
227 if (err)
228 ERROR("sc_rm_set_resource_movable: rsrc %u, ret %u\n",
229 SC_R_M4_1_PID0, err);
230 err = sc_rm_assign_resource(ipc_handle, os_part, SC_R_M4_1_PID0);
231 if (err)
232 ERROR("sc_rm_assign_resource: rsrc %u, ret %u\n",
233 SC_R_M4_1_PID0, err);
234 }
235
236 /*
237 * sc_rm_set_peripheral_permissions
238 * sc_rm_set_memreg_permissions
239 * sc_rm_set_pin_movable
240 */
241
242 for (mr = 0; mr < 64; mr++) {
243 owned = sc_rm_is_memreg_owned(ipc_handle, mr);
244 if (owned) {
245 err = sc_rm_get_memreg_info(ipc_handle, mr, &start, &end);
246 if (err)
247 ERROR("Memreg get info failed, %u\n", mr);
248 NOTICE("Memreg %u 0x%llx -- 0x%llx\n", mr, start, end);
249 if (BL31_BASE >= start && (BL31_LIMIT - 1) <= end) {
250 mr_record = mr; /* Record the mr for ATF running */
251 } else {
252 err = sc_rm_assign_memreg(ipc_handle, os_part, mr);
253 if (err)
254 ERROR("Memreg assign failed, 0x%llx -- 0x%llx, \
255 err %d\n", start, end, err);
256 }
257 }
258 }
259
260 if (mr_record != 64) {
261 err = sc_rm_get_memreg_info(ipc_handle, mr_record, &start, &end);
262 if (err)
263 ERROR("Memreg get info failed, %u\n", mr_record);
264 if ((BL31_LIMIT - 1) < end) {
265 err = sc_rm_memreg_alloc(ipc_handle, &mr, BL31_LIMIT, end);
266 if (err)
267 ERROR("sc_rm_memreg_alloc failed, 0x%llx -- 0x%llx\n",
268 (sc_faddr_t)BL31_LIMIT, end);
269 err = sc_rm_assign_memreg(ipc_handle, os_part, mr);
270 if (err)
271 ERROR("Memreg assign failed, 0x%llx -- 0x%llx\n",
272 (sc_faddr_t)BL31_LIMIT, end);
273 }
274
275 if (start < (BL31_BASE - 1)) {
276 err = sc_rm_memreg_alloc(ipc_handle, &mr, start, BL31_BASE - 1);
277 if (err)
278 ERROR("sc_rm_memreg_alloc failed, 0x%llx -- 0x%llx\n",
279 start, (sc_faddr_t)BL31_BASE - 1);
280 err = sc_rm_assign_memreg(ipc_handle, os_part, mr);
281 if (err)
282 ERROR("Memreg assign failed, 0x%llx -- 0x%llx\n",
283 start, (sc_faddr_t)BL31_BASE - 1);
284 }
285 }
286
287 if (err)
288 NOTICE("Partitioning Failed\n");
289 else
290 NOTICE("Non-secure Partitioning Succeeded\n");
291
292 }
293
bl31_early_platform_setup2(u_register_t arg0,u_register_t arg1,u_register_t arg2,u_register_t arg3)294 void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
295 u_register_t arg2, u_register_t arg3)
296 {
297 #if DEBUG_CONSOLE
298 static console_lpuart_t console;
299 #endif
300 if (sc_ipc_open(&ipc_handle, SC_IPC_BASE) != SC_ERR_NONE)
301 panic();
302
303 #if DEBUG_CONSOLE_A53
304 sc_pm_set_resource_power_mode(ipc_handle, SC_R_UART_0, SC_PM_PW_MODE_ON);
305 sc_pm_clock_rate_t rate = 80000000;
306 sc_pm_set_clock_rate(ipc_handle, SC_R_UART_0, 2, &rate);
307 sc_pm_clock_enable(ipc_handle, SC_R_UART_0, 2, true, false);
308
309 /* configure UART pads */
310 sc_pad_set(ipc_handle, SC_P_UART0_RX, UART_PAD_CTRL);
311 sc_pad_set(ipc_handle, SC_P_UART0_TX, UART_PAD_CTRL);
312 sc_pad_set(ipc_handle, SC_P_UART0_RTS_B, UART_PAD_CTRL);
313 sc_pad_set(ipc_handle, SC_P_UART0_CTS_B, UART_PAD_CTRL);
314 lpuart32_serial_init(IMX_BOOT_UART_BASE);
315 #endif
316
317 #if DEBUG_CONSOLE
318 console_lpuart_register(IMX_BOOT_UART_BASE, IMX_BOOT_UART_CLK_IN_HZ,
319 IMX_CONSOLE_BAUDRATE, &console);
320 #endif
321
322 /* turn on MU1 for non-secure OS/Hypervisor */
323 sc_pm_set_resource_power_mode(ipc_handle, SC_R_MU_1A, SC_PM_PW_MODE_ON);
324 /* Turn on GPT_0's power & clock for non-secure OS/Hypervisor */
325 sc_pm_set_resource_power_mode(ipc_handle, SC_R_GPT_0, SC_PM_PW_MODE_ON);
326 sc_pm_clock_enable(ipc_handle, SC_R_GPT_0, SC_PM_CLK_PER, true, 0);
327 mmio_write_32(IMX_GPT_LPCG_BASE, mmio_read_32(IMX_GPT_LPCG_BASE) | (1 << 25));
328
329 /*
330 * create new partition for non-secure OS/Hypervisor
331 * uses global structs defined in sec_rsrc.h
332 */
333 mx8_partition_resources();
334
335 bl33_image_ep_info.pc = PLAT_NS_IMAGE_OFFSET;
336 bl33_image_ep_info.spsr = get_spsr_for_bl33_entry();
337 SET_SECURITY_STATE(bl33_image_ep_info.h.attr, NON_SECURE);
338
339 /* init the first cluster's cci slave interface */
340 cci_init(PLAT_CCI_BASE, imx8qm_cci_map, PLATFORM_CLUSTER_COUNT);
341 cci_enable_snoop_dvm_reqs(MPIDR_AFFLVL1_VAL(read_mpidr_el1()));
342 }
343
bl31_plat_arch_setup(void)344 void bl31_plat_arch_setup(void)
345 {
346 unsigned long ro_start = BL31_RO_START;
347 unsigned long ro_size = BL31_RO_END - BL31_RO_START;
348 unsigned long rw_start = BL31_RW_START;
349 unsigned long rw_size = BL31_RW_END - BL31_RW_START;
350 #if USE_COHERENT_MEM
351 unsigned long coh_start = BL31_COHERENT_RAM_START;
352 unsigned long coh_size = BL31_COHERENT_RAM_END - BL31_COHERENT_RAM_START;
353 #endif
354
355 mmap_add_region(ro_start, ro_start, ro_size,
356 MT_RO | MT_MEMORY | MT_SECURE);
357 mmap_add_region(rw_start, rw_start, rw_size,
358 MT_RW | MT_MEMORY | MT_SECURE);
359 mmap_add(imx_mmap);
360
361 #if USE_COHERENT_MEM
362 mmap_add_region(coh_start, coh_start, coh_size,
363 MT_DEVICE | MT_RW | MT_SECURE);
364 #endif
365
366 /* setup xlat table */
367 init_xlat_tables();
368 /* enable the MMU */
369 enable_mmu_el3(0);
370 }
371
bl31_platform_setup(void)372 void bl31_platform_setup(void)
373 {
374 plat_gic_driver_init();
375 plat_gic_init();
376 }
377
bl31_plat_get_next_image_ep_info(unsigned int type)378 entry_point_info_t *bl31_plat_get_next_image_ep_info(unsigned int type)
379 {
380 if (type == NON_SECURE)
381 return &bl33_image_ep_info;
382 if (type == SECURE)
383 return &bl32_image_ep_info;
384
385 return NULL;
386 }
387
plat_get_syscnt_freq2(void)388 unsigned int plat_get_syscnt_freq2(void)
389 {
390 return COUNTER_FREQUENCY;
391 }
392
bl31_plat_runtime_setup(void)393 void bl31_plat_runtime_setup(void)
394 {
395 return;
396 }
397