nxp: helper function used by plat & common code

Signed-off-by: rocket <rod.dorris@nxp.com>
Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com>
Change-Id: Idafd8b0d94edf3515e8317431274d77289b7a1d0

1 files changed, 194 insertions, 0 deletions

diff --git a/plat/nxp/common/aarch64/ls_helpers.S b/plat/nxp/common/aarch64/ls_helpers.S
new file mode 100644
index 000000000..4e87a63f9
--- /dev/null
+++ b/plat/nxp/common/aarch64/ls_helpers.S
@@ -0,0 +1,194 @@
+/*
+ * Copyright 2018-2020 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#include <asm_macros.S>
+#include <drivers/console.h>
+#include <lib/cpus/aarch64/cortex_a72.h>
+
+#include <platform_def.h>
+
+
+	.globl	plat_crash_console_init
+	.globl	plat_crash_console_putc
+	.globl	plat_crash_console_flush
+	.globl  plat_core_pos
+	.globl  plat_my_core_pos
+	.globl  plat_core_mask
+	.globl  plat_my_core_mask
+	.globl  plat_core_pos_by_mpidr
+	.globl _disable_ldstr_pfetch_A53
+	.globl _disable_ldstr_pfetch_A72
+	.global	_set_smmu_pagesz_64
+
+	/* int plat_crash_console_init(void)
+	 * Function to initialize the crash console
+	 * without a C Runtime to print crash report.
+	 * Clobber list : x0 - x4
+	 */
+
+	/* int plat_crash_console_init(void)
+	 * Use normal console by default. Switch it to crash
+	 * mode so serial consoles become active again.
+	 * NOTE: This default implementation will only work for
+	 * crashes that occur after a normal console (marked
+	 * valid for the crash state) has been registered with
+	 * the console framework. To debug crashes that occur
+	 * earlier, the platform has to override these functions
+	 * with an implementation that initializes a console
+	 * driver with hardcoded parameters. See
+	 * docs/porting-guide.rst for more information.
+	 */
+func plat_crash_console_init
+	mov	x3, x30
+	mov	x0, #CONSOLE_FLAG_CRASH
+	bl	console_switch_state
+	mov	x0, #1
+	ret	x3
+endfunc plat_crash_console_init
+
+	/* void plat_crash_console_putc(int character)
+	 * Output through the normal console by default.
+	 */
+func plat_crash_console_putc
+	b	console_putc
+endfunc plat_crash_console_putc
+
+	/* void plat_crash_console_flush(void)
+	 * Flush normal console by default.
+	 */
+func plat_crash_console_flush
+	b	console_flush
+endfunc plat_crash_console_flush
+
+/* This function implements a part of the critical interface between the psci
+ * generic layer and the platform that allows the former to query the platform
+ * to convert an MPIDR to a unique linear index. An error code (-1) is returned
+ * in case the MPIDR is invalid.
+ */
+func plat_core_pos_by_mpidr
+
+	b  plat_core_pos
+
+endfunc plat_core_pos_by_mpidr
+
+#if (SYMMETRICAL_CLUSTERS)
+/* unsigned int plat_my_core_mask(void)
+ *  generate a mask bit for this core
+ */
+func plat_my_core_mask
+	mrs  x0, MPIDR_EL1
+	b    plat_core_mask
+endfunc plat_my_core_mask
+
+/* unsigned int plat_core_mask(u_register_t mpidr)
+ * generate a lsb-based mask bit for the core specified by mpidr in x0.
+ *
+ * SoC core = ((cluster * cpu_per_cluster) + core)
+ * mask = (1 << SoC core)
+ */
+func plat_core_mask
+	mov   w1, wzr
+	mov   w2, wzr
+
+	/* extract cluster */
+	bfxil w1, w0, #8, #8
+	/* extract cpu # */
+	bfxil w2, w0, #0, #8
+
+	mov   w0, wzr
+
+	/* error checking */
+	cmp   w1, #NUMBER_OF_CLUSTERS
+	b.ge  1f
+	cmp   w2, #CORES_PER_CLUSTER
+	b.ge  1f
+
+	mov   w0, #CORES_PER_CLUSTER
+	mul   w1, w1, w0
+	add   w1, w1, w2
+	mov   w2, #0x1
+	lsl   w0, w2, w1
+1:
+	ret
+endfunc plat_core_mask
+
+/*
+ * unsigned int plat_my_core_pos(void)
+ *  generate a linear core number for this core
+ */
+func plat_my_core_pos
+	mrs  x0, MPIDR_EL1
+	b    plat_core_pos
+endfunc plat_my_core_pos
+
+/*
+ * unsigned int plat_core_pos(u_register_t mpidr)
+ * Generate a linear core number for the core specified by mpidr.
+ *
+ * SoC core = ((cluster * cpu_per_cluster) + core)
+ * Returns -1 if mpidr invalid
+ */
+func plat_core_pos
+	mov   w1, wzr
+	mov   w2, wzr
+	bfxil w1, w0, #8, #8	/* extract cluster */
+	bfxil w2, w0, #0, #8	/* extract cpu #   */
+
+	mov   w0, #-1
+
+	/* error checking */
+	cmp   w1, #NUMBER_OF_CLUSTERS
+	b.ge  1f
+	cmp   w2, #CORES_PER_CLUSTER
+	b.ge  1f
+
+	mov   w0, #CORES_PER_CLUSTER
+	mul   w1, w1, w0
+	add   w0, w1, w2
+1:
+	ret
+endfunc plat_core_pos
+
+#endif
+
+/* this function disables the load-store prefetch of the calling core
+ * Note: this function is for A72 cores ONLY
+ * in:  none
+ * out: none
+ * uses x0
+ */
+func _disable_ldstr_pfetch_A72
+
+	mrs   x0, CORTEX_A72_CPUACTLR_EL1
+	tst   x0, #CORTEX_A72_CPUACTLR_EL1_DISABLE_L1_DCACHE_HW_PFTCH
+	b.eq  1f
+	b     2f
+
+.align 6
+1:
+	dsb   sy
+	isb
+	orr   x0, x0, #CORTEX_A72_CPUACTLR_EL1_DISABLE_L1_DCACHE_HW_PFTCH
+	msr   CORTEX_A72_CPUACTLR_EL1, x0
+	isb
+
+2:
+	ret
+endfunc _disable_ldstr_pfetch_A72
+
+/*
+ * Function sets the SACR pagesize to 64k
+ */
+func _set_smmu_pagesz_64
+
+	ldr	x1, =NXP_SMMU_ADDR
+	ldr	w0, [x1, #0x10]
+	orr	w0, w0, #1 << 16	/* setting to 64K page */
+	str	w0, [x1, #0x10]
+
+	ret
+endfunc _set_smmu_pagesz_64