1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) 2008-2009 ST-Ericsson AB
41 	.name = "DTCM RAM",
48 	.name = "ITCM RAM",
77 	unsigned long vaddr;  in tcm_alloc()
95 	gen_pool_free(tcm_pool, (unsigned long) addr, len);  in tcm_free()
114 	const int tcm_sizes[16] = { 0, -1, -1, 4, 8, 16, 32, 64, 128,  in setup_tcm_bank()
115 				    256, 512, 1024, -1, -1, -1, -1 };  in setup_tcm_bank()
141 		return -EINVAL;  in setup_tcm_bank()
145 		return -EINVAL;  in setup_tcm_bank()
183  * When we are running in the non-secure world and the secure world
200  * In this particular case (MRC with ARM condition code ALways) the
201  * Thumb-2 and ARM instruction encoding are identical, so this hook
202  * will work on a Thumb-2 kernel.
205  * T1/A1 for the bit-by-bit details.
209  *   |  |  |   |   |   |   |  +---- opc2           0|1 = 000|001
210  *   |  |  |   |   |   |   +------- CRm              0 = 0001
211  *   |  |  |   |   |   +----------- CRn              0 = 1001
212  *   |  |  |   |   +--------------- Rt               ? = ????
213  *   |  |  |   +------------------- opc1             0 =  000
214  *   |  |  +----------------------- coproc          15 = 1111
215  *   |  +-------------------------- condition   ALways = 1110
216  *   +----------------------------- instruction    MRC = 1110
222  *  [  ] [  ] [ ]| [  ] [  ] [  ] [ ]| +--- CRm
223  *    |    |   | |   |    |    |   | +----- SBO
224  *    |    |   | |   |    |    |   +------- opc2
225  *    |    |   | |   |    |    +----------- coproc
226  *    |    |   | |   |    +---------------- Rt
227  *    |    |   | |   +--------------------- CRn
228  *    |    |   | +------------------------- SBO
229  *    |    |   +--------------------------- opc1
230  *    |    +------------------------------- instruction
231  *    +------------------------------------ condition
240 	regs->uregs[(instr >> DEST_REG_SHIFT) & DEST_REG_MASK] = 0;  in tcm_handler()
241 	regs->ARM_pc += 4;  in tcm_handler()
261 	size_t dtcm_code_sz = &__edtcm_data - &__sdtcm_data;  in tcm_init()
262 	size_t itcm_code_sz = &__eitcm_text - &__sitcm_text;  in tcm_init()
265 	char *ram;  in tcm_init()  local
276 				"ITCM code compiled in, but no TCM present "  in tcm_init()
277 				"in pre-v5 CPU\n", dtcm_code_sz, itcm_code_sz);  in tcm_init()
284 	 * This code only supports v6-compatible TCMTR implementations.  in tcm_init()
307 		/* This means you compiled more code than fits into DTCM */  in tcm_init()
308 		if (dtcm_code_sz > (dtcm_end - DTCM_OFFSET)) {  in tcm_init()
309 			pr_info("CPU DTCM: %u bytes of code compiled to "  in tcm_init()
311 				dtcm_code_sz, (dtcm_end - DTCM_OFFSET));  in tcm_init()
318 		if (!(dtcm_end - DTCM_OFFSET))  in tcm_init()
320 		dtcm_res.end = dtcm_end - 1;  in tcm_init()
322 		dtcm_iomap[0].length = dtcm_end - DTCM_OFFSET;  in tcm_init()
324 		/* Copy data from RAM to DTCM */  in tcm_init()
327 		ram   = &__dtcm_start;  in tcm_init()
328 		memcpy(start, ram, dtcm_code_sz);  in tcm_init()
329 		pr_debug("CPU DTCM: copied data from %p - %p\n",  in tcm_init()
333 		pr_info("CPU DTCM: %u bytes of code compiled to DTCM but no "  in tcm_init()
345 		/* This means you compiled more code than fits into ITCM */  in tcm_init()
346 		if (itcm_code_sz > (itcm_end - ITCM_OFFSET)) {  in tcm_init()
347 			pr_info("CPU ITCM: %u bytes of code compiled to "  in tcm_init()
349 				itcm_code_sz, (itcm_end - ITCM_OFFSET));  in tcm_init()
356 		if (!(itcm_end - ITCM_OFFSET))  in tcm_init()
358 		itcm_res.end = itcm_end - 1;  in tcm_init()
360 		itcm_iomap[0].length = itcm_end - ITCM_OFFSET;  in tcm_init()
362 		/* Copy code from RAM to ITCM */  in tcm_init()
365 		ram   = &__itcm_start;  in tcm_init()
366 		memcpy(start, ram, itcm_code_sz);  in tcm_init()
367 		pr_debug("CPU ITCM: copied code from %p - %p\n",  in tcm_init()
371 		pr_info("CPU ITCM: %u bytes of code compiled to ITCM but no "  in tcm_init()
395 	tcm_pool = gen_pool_create(2, -1);  in setup_tcm_pool()
403 					   dtcm_end - dtcm_pool_start, -1);  in setup_tcm_pool()
411 				 dtcm_end - dtcm_pool_start,  in setup_tcm_pool()
420 					   itcm_end - itcm_pool_start, -1);  in setup_tcm_pool()
428 				 itcm_end - itcm_pool_start,  in setup_tcm_pool()