Add support for QEMU virt ARMv8-A target
This patch adds support for the QEMU virt ARMv8-A target.
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
diff --git a/plat/qemu/aarch64/plat_helpers.S b/plat/qemu/aarch64/plat_helpers.S
new file mode 100644
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+++ b/plat/qemu/aarch64/plat_helpers.S
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+/*
+ * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <arch.h>
+#include <asm_macros.S>
+#include <assert_macros.S>
+#include <platform_def.h>
+
+ .globl plat_my_core_pos
+ .globl plat_get_my_entrypoint
+ .globl platform_mem_init
+ .globl plat_qemu_calc_core_pos
+ .globl plat_crash_console_init
+ .globl plat_crash_console_putc
+ .globl plat_secondary_cold_boot_setup
+ .globl plat_get_my_entrypoint
+ .globl plat_is_my_cpu_primary
+
+
+func plat_my_core_pos
+ mrs x0, mpidr_el1
+ b plat_qemu_calc_core_pos
+endfunc plat_my_core_pos
+
+/*
+ * unsigned int plat_qemu_calc_core_pos(u_register_t mpidr);
+ * With this function: CorePos = (ClusterId * 4) + CoreId
+ */
+func plat_qemu_calc_core_pos
+ and x1, x0, #MPIDR_CPU_MASK
+ and x0, x0, #MPIDR_CLUSTER_MASK
+ add x0, x1, x0, LSR #6
+ ret
+endfunc plat_qemu_calc_core_pos
+
+ /* -----------------------------------------------------
+ * unsigned int plat_is_my_cpu_primary (void);
+ *
+ * Find out whether the current cpu is the primary
+ * cpu.
+ * -----------------------------------------------------
+ */
+func plat_is_my_cpu_primary
+ mrs x0, mpidr_el1
+ and x0, x0, #(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)
+ cmp x0, #QEMU_PRIMARY_CPU
+ cset w0, eq
+ ret
+endfunc plat_is_my_cpu_primary
+
+ /* -----------------------------------------------------
+ * void plat_secondary_cold_boot_setup (void);
+ *
+ * This function performs any platform specific actions
+ * needed for a secondary cpu after a cold reset e.g
+ * mark the cpu's presence, mechanism to place it in a
+ * holding pen etc.
+ * -----------------------------------------------------
+ */
+func plat_secondary_cold_boot_setup
+ /* Calculate address of our hold entry */
+ bl plat_my_core_pos
+ mov_imm x2, PLAT_QEMU_HOLD_BASE
+
+ /* Wait until we have a go */
+poll_mailbox:
+ ldr x1, [x2, x0]
+ cbz x1, 1f
+ mov_imm x0, PLAT_QEMU_TRUSTED_MAILBOX_BASE
+ ldr x1, [x0]
+ br x1
+1:
+ wfe
+ b poll_mailbox
+endfunc plat_secondary_cold_boot_setup
+
+func plat_get_my_entrypoint
+ /* TODO support warm boot */
+ mov x0, #0
+ ret
+endfunc plat_get_my_entrypoint
+
+func platform_mem_init
+ ret
+endfunc platform_mem_init
+
+ /* ---------------------------------------------
+ * int plat_crash_console_init(void)
+ * Function to initialize the crash console
+ * without a C Runtime to print crash report.
+ * Clobber list : x0, x1, x2
+ * ---------------------------------------------
+ */
+func plat_crash_console_init
+ mov_imm x0, PLAT_QEMU_CRASH_UART_BASE
+ mov_imm x1, PLAT_QEMU_CRASH_UART_CLK_IN_HZ
+ mov_imm x2, PLAT_QEMU_CONSOLE_BAUDRATE
+ b console_core_init
+endfunc plat_crash_console_init
+
+ /* ---------------------------------------------
+ * int plat_crash_console_putc(int c)
+ * Function to print a character on the crash
+ * console without a C Runtime.
+ * Clobber list : x1, x2
+ * ---------------------------------------------
+ */
+func plat_crash_console_putc
+ mov_imm x1, PLAT_QEMU_CRASH_UART_BASE
+ b console_core_putc
+endfunc plat_crash_console_putc
+
+