diff options
Diffstat (limited to 'target/linux/layerscape/patches-4.4/3008-armv8-aarch32-Add-SMP-support-for-32-bit-Linux.patch')
-rw-r--r-- | target/linux/layerscape/patches-4.4/3008-armv8-aarch32-Add-SMP-support-for-32-bit-Linux.patch | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/target/linux/layerscape/patches-4.4/3008-armv8-aarch32-Add-SMP-support-for-32-bit-Linux.patch b/target/linux/layerscape/patches-4.4/3008-armv8-aarch32-Add-SMP-support-for-32-bit-Linux.patch deleted file mode 100644 index 31f1d98..0000000 --- a/target/linux/layerscape/patches-4.4/3008-armv8-aarch32-Add-SMP-support-for-32-bit-Linux.patch +++ /dev/null @@ -1,103 +0,0 @@ -From 5d06e90bd0e3bdd104b7b25173e05617f02dc44d Mon Sep 17 00:00:00 2001 -From: Alison Wang <b18965@freescale.com> -Date: Fri, 13 May 2016 15:09:47 +0800 -Subject: [PATCH 08/70] armv8: aarch32: Add SMP support for 32-bit Linux - -The patch adds SMP support for running 32-bit Linux kernel. Spin-table -method is used for SMP support. - -Signed-off-by: Alison Wang <alison.wang@nxp.com> -Signed-off-by: Chenhui Zhao <chenhui.zhao@nxp.com> ---- - arch/arm/mach-imx/common.h | 1 + - arch/arm/mach-imx/mach-ls1043a.c | 1 + - arch/arm/mach-imx/platsmp.c | 49 ++++++++++++++++++++++++++++++++++++++ - 3 files changed, 51 insertions(+) - ---- a/arch/arm/mach-imx/common.h -+++ b/arch/arm/mach-imx/common.h -@@ -155,5 +155,6 @@ static inline void imx_init_l2cache(void - - extern struct smp_operations imx_smp_ops; - extern struct smp_operations ls1021a_smp_ops; -+extern const struct smp_operations layerscape_smp_ops; - - #endif ---- a/arch/arm/mach-imx/mach-ls1043a.c -+++ b/arch/arm/mach-imx/mach-ls1043a.c -@@ -17,5 +17,6 @@ static const char * const ls1043a_dt_com - }; - - DT_MACHINE_START(LS1043A, "Freescale LS1043A") -+ .smp = smp_ops(layerscape_smp_ops), - .dt_compat = ls1043a_dt_compat, - MACHINE_END ---- a/arch/arm/mach-imx/platsmp.c -+++ b/arch/arm/mach-imx/platsmp.c -@@ -14,6 +14,7 @@ - #include <linux/of_address.h> - #include <linux/of.h> - #include <linux/smp.h> -+#include <linux/types.h> - - #include <asm/cacheflush.h> - #include <asm/page.h> -@@ -26,6 +27,8 @@ - u32 g_diag_reg; - static void __iomem *scu_base; - -+static u64 cpu_release_addr[NR_CPUS]; -+ - static struct map_desc scu_io_desc __initdata = { - /* .virtual and .pfn are run-time assigned */ - .length = SZ_4K, -@@ -127,3 +130,49 @@ struct smp_operations ls1021a_smp_ops _ - .smp_prepare_cpus = ls1021a_smp_prepare_cpus, - .smp_boot_secondary = ls1021a_boot_secondary, - }; -+ -+static int layerscape_smp_boot_secondary(unsigned int cpu, -+ struct task_struct *idle) -+{ -+ u32 secondary_startup_phys; -+ __le32 __iomem *release_addr; -+ -+ secondary_startup_phys = virt_to_phys(secondary_startup); -+ -+ release_addr = ioremap_cache((u32)cpu_release_addr[cpu], -+ sizeof(u64)); -+ if (!release_addr) -+ return -ENOMEM; -+ -+ writel_relaxed(secondary_startup_phys, release_addr); -+ writel_relaxed(0, release_addr + 1); -+ __cpuc_flush_dcache_area((__force void *)release_addr, -+ sizeof(u64)); -+ -+ sev(); -+ -+ iounmap(release_addr); -+ -+ return 0; -+} -+ -+static void layerscape_smp_init_cpus(void) -+{ -+ struct device_node *dnt = NULL; -+ unsigned int cpu = 0; -+ -+ while ((dnt = of_find_node_by_type(dnt, "cpu"))) { -+ if (of_property_read_u64(dnt, "cpu-release-addr", -+ &cpu_release_addr[cpu])) { -+ pr_err("CPU %d: missing or invalid cpu-release-addr property\n", -+ cpu); -+ } -+ -+ cpu++; -+ } -+} -+ -+const struct smp_operations layerscape_smp_ops __initconst = { -+ .smp_init_cpus = layerscape_smp_init_cpus, -+ .smp_boot_secondary = layerscape_smp_boot_secondary, -+}; |