*
* Copyright (C) 2009 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
*
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * 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
+ * SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __ASM_ARM_MACRO_H__
bcs 1b
.endm
+#ifdef CONFIG_ARM64
+/*
+ * Register aliases.
+ */
+lr .req x30
+
+/*
+ * Branch according to exception level
+ */
+.macro switch_el, xreg, el3_label, el2_label, el1_label
+ mrs \xreg, CurrentEL
+ cmp \xreg, 0xc
+ b.eq \el3_label
+ cmp \xreg, 0x8
+ b.eq \el2_label
+ cmp \xreg, 0x4
+ b.eq \el1_label
+.endm
+
+/*
+ * Branch if current processor is a slave,
+ * choose processor with all zero affinity value as the master.
+ */
+.macro branch_if_slave, xreg, slave_label
+ mrs \xreg, mpidr_el1
+ tst \xreg, #0xff /* Test Affinity 0 */
+ b.ne \slave_label
+ lsr \xreg, \xreg, #8
+ tst \xreg, #0xff /* Test Affinity 1 */
+ b.ne \slave_label
+ lsr \xreg, \xreg, #8
+ tst \xreg, #0xff /* Test Affinity 2 */
+ b.ne \slave_label
+ lsr \xreg, \xreg, #16
+ tst \xreg, #0xff /* Test Affinity 3 */
+ b.ne \slave_label
+.endm
+
+/*
+ * Branch if current processor is a master,
+ * choose processor with all zero affinity value as the master.
+ */
+.macro branch_if_master, xreg1, xreg2, master_label
+ mrs \xreg1, mpidr_el1
+ lsr \xreg2, \xreg1, #32
+ lsl \xreg1, \xreg1, #40
+ lsr \xreg1, \xreg1, #40
+ orr \xreg1, \xreg1, \xreg2
+ cbz \xreg1, \master_label
+.endm
+
+.macro armv8_switch_to_el2_m, xreg1
+ /* 64bit EL2 | HCE | SMD | RES1 (Bits[5:4]) | Non-secure EL0/EL1 */
+ mov \xreg1, #0x5b1
+ msr scr_el3, \xreg1
+ msr cptr_el3, xzr /* Disable coprocessor traps to EL3 */
+ mov \xreg1, #0x33ff
+ msr cptr_el2, \xreg1 /* Disable coprocessor traps to EL2 */
+
+ /* Initialize SCTLR_EL2
+ *
+ * setting RES1 bits (29,28,23,22,18,16,11,5,4) to 1
+ * and RES0 bits (31,30,27,26,24,21,20,17,15-13,10-6) +
+ * EE,WXN,I,SA,C,A,M to 0
+ */
+ mov \xreg1, #0x0830
+ movk \xreg1, #0x30C5, lsl #16
+ msr sctlr_el2, \xreg1
+
+ /* Return to the EL2_SP2 mode from EL3 */
+ mov \xreg1, sp
+ msr sp_el2, \xreg1 /* Migrate SP */
+ mrs \xreg1, vbar_el3
+ msr vbar_el2, \xreg1 /* Migrate VBAR */
+ mov \xreg1, #0x3c9
+ msr spsr_el3, \xreg1 /* EL2_SP2 | D | A | I | F */
+ msr elr_el3, lr
+ eret
+.endm
+
+.macro armv8_switch_to_el1_m, xreg1, xreg2
+ /* Initialize Generic Timers */
+ mrs \xreg1, cnthctl_el2
+ orr \xreg1, \xreg1, #0x3 /* Enable EL1 access to timers */
+ msr cnthctl_el2, \xreg1
+ msr cntvoff_el2, xzr
+
+ /* Initilize MPID/MPIDR registers */
+ mrs \xreg1, midr_el1
+ mrs \xreg2, mpidr_el1
+ msr vpidr_el2, \xreg1
+ msr vmpidr_el2, \xreg2
+
+ /* Disable coprocessor traps */
+ mov \xreg1, #0x33ff
+ msr cptr_el2, \xreg1 /* Disable coprocessor traps to EL2 */
+ msr hstr_el2, xzr /* Disable coprocessor traps to EL2 */
+ mov \xreg1, #3 << 20
+ msr cpacr_el1, \xreg1 /* Enable FP/SIMD at EL1 */
+
+ /* Initialize HCR_EL2 */
+ mov \xreg1, #(1 << 31) /* 64bit EL1 */
+ orr \xreg1, \xreg1, #(1 << 29) /* Disable HVC */
+ msr hcr_el2, \xreg1
+
+ /* SCTLR_EL1 initialization
+ *
+ * setting RES1 bits (29,28,23,22,20,11) to 1
+ * and RES0 bits (31,30,27,21,17,13,10,6) +
+ * UCI,EE,EOE,WXN,nTWE,nTWI,UCT,DZE,I,UMA,SED,ITD,
+ * CP15BEN,SA0,SA,C,A,M to 0
+ */
+ mov \xreg1, #0x0800
+ movk \xreg1, #0x30d0, lsl #16
+ msr sctlr_el1, \xreg1
+
+ /* Return to the EL1_SP1 mode from EL2 */
+ mov \xreg1, sp
+ msr sp_el1, \xreg1 /* Migrate SP */
+ mrs \xreg1, vbar_el2
+ msr vbar_el1, \xreg1 /* Migrate VBAR */
+ mov \xreg1, #0x3c5
+ msr spsr_el2, \xreg1 /* EL1_SP1 | D | A | I | F */
+ msr elr_el2, lr
+ eret
+.endm
+
+#if defined(CONFIG_GICV3)
+.macro gic_wait_for_interrupt_m xreg1
+0 : wfi
+ mrs \xreg1, ICC_IAR1_EL1
+ msr ICC_EOIR1_EL1, \xreg1
+ cbnz \xreg1, 0b
+.endm
+#elif defined(CONFIG_GICV2)
+.macro gic_wait_for_interrupt_m xreg1, wreg2
+0 : wfi
+ ldr \wreg2, [\xreg1, GICC_AIAR]
+ str \wreg2, [\xreg1, GICC_AEOIR]
+ and \wreg2, \wreg2, #3ff
+ cbnz \wreg2, 0b
+.endm
+#endif
+
+#endif /* CONFIG_ARM64 */
+
#endif /* __ASSEMBLY__ */
#endif /* __ASM_ARM_MACRO_H__ */
projects / karo-tx-uboot.git / blobdiff