[src/trunk]: src/sys/arch/arm/broadcom hatch secondary processors (aarch64)

[ryo <ryo%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/fad1f9e9a2e6
branches:  trunk
changeset: 324519:fad1f9e9a2e6
user:      ryo <ryo%NetBSD.org@localhost>
date:      Mon Jul 09 06:21:46 2018 +0000

description:
hatch secondary processors (aarch64)

diffstat:

 sys/arch/arm/broadcom/bcm283x_platform.c |  56 +++++++++++++++++++++++++------
 1 files changed, 45 insertions(+), 11 deletions(-)

diffs (87 lines):

diff -r 9bbcb1a32dec -r fad1f9e9a2e6 sys/arch/arm/broadcom/bcm283x_platform.c
--- a/sys/arch/arm/broadcom/bcm283x_platform.c  Mon Jul 09 06:19:53 2018 +0000
+++ b/sys/arch/arm/broadcom/bcm283x_platform.c  Mon Jul 09 06:21:46 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bcm283x_platform.c,v 1.6 2018/06/27 11:12:14 ryo Exp $ */
+/*     $NetBSD: bcm283x_platform.c,v 1.7 2018/07/09 06:21:46 ryo Exp $ */
 
 /*-
  * Copyright (c) 2017 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: bcm283x_platform.c,v 1.6 2018/06/27 11:12:14 ryo Exp $");
+__KERNEL_RCSID(0, "$NetBSD: bcm283x_platform.c,v 1.7 2018/07/09 06:21:46 ryo Exp $");
 
 #include "opt_arm_debug.h"
 #include "opt_bcm283x.h"
@@ -774,18 +774,51 @@
 {
 #define RPI_CPU_MAX    4
 
-#ifdef MULTIPROCESSOR
-       extern int cortex_mmuinfo;
-
-       arm_cpu_max = RPI_CPU_MAX;
-       cortex_mmuinfo = armreg_ttbr_read();
 #ifdef VERBOSE_INIT_ARM
-       printf("%s: %d cpus present\n", __func__, arm_cpu_max);
-       printf("%s: cortex_mmuinfo %x\n", __func__, cortex_mmuinfo);
-#endif
+#define DPRINTF(...)   printf(__VA_ARGS__)
+#else
+#define DPRINTF(...)
 #endif
 
-#ifndef __aarch64__
+#ifdef MULTIPROCESSOR
+       arm_cpu_max = RPI_CPU_MAX;
+       DPRINTF("%s: %d cpus present\n", __func__, arm_cpu_max);
+#ifdef __arm__
+       extern int cortex_mmuinfo;
+       cortex_mmuinfo = armreg_ttbr_read();
+       DPRINTF("%s: cortex_mmuinfo %x\n", __func__, cortex_mmuinfo);
+#endif
+#endif /* MULTIPROCESSOR */
+
+#ifdef __aarch64__
+       /*
+        * XXX: use psci_fdt_bootstrap()
+        */
+       extern void aarch64_mpstart(void);
+       for (int i = 1; i < RPI_CPU_MAX; i++) {
+               /*
+                * Reference:
+                *   armstubs/armstub8.S
+                *   in https://github.com/raspberrypi/tools
+                */
+               volatile uint64_t *cpu_release_addr;
+#define RPI3_ARMSTUB8_SPINADDR_BASE    0x000000d8
+               cpu_release_addr =
+                   AARCH64_PA_TO_KVA(RPI3_ARMSTUB8_SPINADDR_BASE + i * 8);
+               *cpu_release_addr = aarch64_kern_vtophys(aarch64_mpstart);
+
+               /* need flush cache. secondary processors are cache disabled */
+               cpu_dcache_wb_range(cpu_release_addr, sizeof(cpu_release_addr));
+               __asm __volatile("sev" ::: "memory");
+
+#if defined(VERBOSE_INIT_ARM) && defined(EARLYCONS)
+               /* wait secondary processor's debug output */
+               gtmr_delay(100000);
+#endif
+       }
+#endif /* __aarch64__ */
+
+#ifdef __arm__
        /*
         * Even if no options MULTIPROCESSOR,
         * It is need to initialize the secondary CPU,
@@ -803,6 +836,7 @@
                    (uint32_t)cortex_mpstart);
        }
 #endif
+
 #ifdef MULTIPROCESSOR
        /* Wake up AP in case firmware has placed it in WFE state */
        __asm __volatile("sev" ::: "memory");