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authorLinus Torvalds <torvalds@linux-foundation.org>2013-03-02 07:44:16 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-03-02 07:44:16 -0800
commitaebb2afd5420c860b7fbc3882a323ef1247fbf16 (patch)
tree05ee0efcebca5ec421de44de7a6d6271088c64a8 /arch/mips/pmcs-msp71xx/msp_smtc.c
parent8eae508b7c6ff502a71d0293b69e97c5505d5840 (diff)
parentedb15d83a875a1f4b1576188844db5c330c3267d (diff)
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS updates from Ralf Baechle: o Add basic support for the Mediatek/Ralink Wireless SoC family. o The Qualcomm Atheros platform is extended by support for the new QCA955X SoC series as well as a bunch of patches that get the code ready for OF support. o Lantiq and BCM47XX platform have a few improvements and bug fixes. o MIPS has sent a few patches that get the kernel ready for the upcoming microMIPS support. o The rest of the series is made up of small bug fixes and cleanups that relate to various parts of the MIPS code. The biggy in there is a whitespace cleanup. After I was sent another set of whitespace cleanup patches I decided it was the time to clean the whitespace "issues" for once and and that touches many files below arch/mips/. Fix up silly conflicts, mostly due to whitespace cleanups. * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (105 commits) MIPS: Quit exporting kernel internel break codes to uapi/asm/break.h MIPS: remove broken conditional inside vpe loader code MIPS: SMTC: fix implicit declaration of set_vi_handler MIPS: early_printk: drop __init annotations MIPS: Probe for and report hardware virtualization support. MIPS: ath79: add support for the Qualcomm Atheros AP136-010 board MIPS: ath79: add USB controller registration code for the QCA955X SoCs MIPS: ath79: add PCI controller registration code for the QCA955X SoCs MIPS: ath79: add WMAC registration code for the QCA955X SoCs MIPS: ath79: register UART for the QCA955X SoCs MIPS: ath79: add QCA955X specific glue to ath79_device_reset_{set, clear} MIPS: ath79: add GPIO setup code for the QCA955X SoCs MIPS: ath79: add IRQ handling code for the QCA955X SoCs MIPS: ath79: add clock setup code for the QCA955X SoCs MIPS: ath79: add SoC detection code for the QCA955X SoCs MIPS: ath79: add early printk support for the QCA955X SoCs MIPS: ath79: fix WMAC IRQ resource assignment mips: reserve elfcorehdr mips: Make sure kernel memory is in iomem MIPS: ath79: use dynamically allocated USB platform devices ...
Diffstat (limited to 'arch/mips/pmcs-msp71xx/msp_smtc.c')
-rw-r--r--arch/mips/pmcs-msp71xx/msp_smtc.c105
1 files changed, 105 insertions, 0 deletions
diff --git a/arch/mips/pmcs-msp71xx/msp_smtc.c b/arch/mips/pmcs-msp71xx/msp_smtc.c
new file mode 100644
index 00000000000..c8dcc1c01e1
--- /dev/null
+++ b/arch/mips/pmcs-msp71xx/msp_smtc.c
@@ -0,0 +1,105 @@
+/*
+ * MSP71xx Platform-specific hooks for SMP operation
+ */
+#include <linux/irq.h>
+#include <linux/init.h>
+
+#include <asm/mipsmtregs.h>
+#include <asm/mipsregs.h>
+#include <asm/smtc.h>
+#include <asm/smtc_ipi.h>
+
+/* VPE/SMP Prototype implements platform interfaces directly */
+
+/*
+ * Cause the specified action to be performed on a targeted "CPU"
+ */
+
+static void msp_smtc_send_ipi_single(int cpu, unsigned int action)
+{
+ /* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
+ smtc_send_ipi(cpu, LINUX_SMP_IPI, action);
+}
+
+static void msp_smtc_send_ipi_mask(const struct cpumask *mask,
+ unsigned int action)
+{
+ unsigned int i;
+
+ for_each_cpu(i, mask)
+ msp_smtc_send_ipi_single(i, action);
+}
+
+/*
+ * Post-config but pre-boot cleanup entry point
+ */
+static void __cpuinit msp_smtc_init_secondary(void)
+{
+ int myvpe;
+
+ /* Don't enable Malta I/O interrupts (IP2) for secondary VPEs */
+ myvpe = read_c0_tcbind() & TCBIND_CURVPE;
+ if (myvpe > 0)
+ change_c0_status(ST0_IM, STATUSF_IP0 | STATUSF_IP1 |
+ STATUSF_IP6 | STATUSF_IP7);
+ smtc_init_secondary();
+}
+
+/*
+ * Platform "CPU" startup hook
+ */
+static void __cpuinit msp_smtc_boot_secondary(int cpu,
+ struct task_struct *idle)
+{
+ smtc_boot_secondary(cpu, idle);
+}
+
+/*
+ * SMP initialization finalization entry point
+ */
+static void __cpuinit msp_smtc_smp_finish(void)
+{
+ smtc_smp_finish();
+}
+
+/*
+ * Hook for after all CPUs are online
+ */
+
+static void msp_smtc_cpus_done(void)
+{
+}
+
+/*
+ * Platform SMP pre-initialization
+ *
+ * As noted above, we can assume a single CPU for now
+ * but it may be multithreaded.
+ */
+
+static void __init msp_smtc_smp_setup(void)
+{
+ /*
+ * we won't get the definitive value until
+ * we've run smtc_prepare_cpus later, but
+ */
+
+ if (read_c0_config3() & (1 << 2))
+ smp_num_siblings = smtc_build_cpu_map(0);
+}
+
+static void __init msp_smtc_prepare_cpus(unsigned int max_cpus)
+{
+ smtc_prepare_cpus(max_cpus);
+}
+
+struct plat_smp_ops msp_smtc_smp_ops = {
+ .send_ipi_single = msp_smtc_send_ipi_single,
+ .send_ipi_mask = msp_smtc_send_ipi_mask,
+ .init_secondary = msp_smtc_init_secondary,
+ .smp_finish = msp_smtc_smp_finish,
+ .cpus_done = msp_smtc_cpus_done,
+ .boot_secondary = msp_smtc_boot_secondary,
+ .smp_setup = msp_smtc_smp_setup,
+ .prepare_cpus = msp_smtc_prepare_cpus,
+};