projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 088f3876 A |
1 | /* |
| 2 | * MSP71xx Platform-specific hooks for SMP operation | |
| 3 | */ | |
| 4 | #include <linux/irq.h> | |
| 5 | #include <linux/init.h> | |
| 6 | ||
| 7 | #include <asm/mipsmtregs.h> | |
| 8 | #include <asm/mipsregs.h> | |
| 9 | #include <asm/smtc.h> | |
| 10 | #include <asm/smtc_ipi.h> | |
| 11 | ||
| 12 | /* VPE/SMP Prototype implements platform interfaces directly */ | |
| 13 | ||
| 14 | /* | |
| 15 | * Cause the specified action to be performed on a targeted "CPU" | |
| 16 | */ | |
| 17 | ||
| 18 | static void msp_smtc_send_ipi_single(int cpu, unsigned int action) | |
| 19 | { | |
| 20 | /* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */ | |
| 21 | smtc_send_ipi(cpu, LINUX_SMP_IPI, action); | |
| 22 | } | |
| 23 | ||
| 24 | static void msp_smtc_send_ipi_mask(const struct cpumask *mask, | |
| 25 | unsigned int action) | |
| 26 | { | |
| 27 | unsigned int i; | |
| 28 | ||
| 29 | for_each_cpu(i, mask) | |
| 30 | msp_smtc_send_ipi_single(i, action); | |
| 31 | } | |
| 32 | ||
| 33 | /* | |
| 34 | * Post-config but pre-boot cleanup entry point | |
| 35 | */ | |
| 36 | static void __cpuinit msp_smtc_init_secondary(void) | |
| 37 | { | |
| 38 | int myvpe; | |
| 39 | ||
| 40 | /* Don't enable Malta I/O interrupts (IP2) for secondary VPEs */ | |
| 41 | myvpe = read_c0_tcbind() & TCBIND_CURVPE; | |
| 42 | if (myvpe > 0) | |
| 43 | change_c0_status(ST0_IM, STATUSF_IP0 | STATUSF_IP1 | | |
| 44 | STATUSF_IP6 | STATUSF_IP7); | |
| 45 | smtc_init_secondary(); | |
| 46 | } | |
| 47 | ||
| 48 | /* | |
| 49 | * Platform "CPU" startup hook | |
| 50 | */ | |
| 51 | static void __cpuinit msp_smtc_boot_secondary(int cpu, | |
| 52 | struct task_struct *idle) | |
| 53 | { | |
| 54 | smtc_boot_secondary(cpu, idle); | |
| 55 | } | |
| 56 | ||
| 57 | /* | |
| 58 | * SMP initialization finalization entry point | |
| 59 | */ | |
| 60 | static void __cpuinit msp_smtc_smp_finish(void) | |
| 61 | { | |
| 62 | smtc_smp_finish(); | |
| 63 | } | |
| 64 | ||
| 65 | /* | |
| 66 | * Hook for after all CPUs are online | |
| 67 | */ | |
| 68 | ||
| 69 | static void msp_smtc_cpus_done(void) | |
| 70 | { | |
| 71 | } | |
| 72 | ||
| 73 | /* | |
| 74 | * Platform SMP pre-initialization | |
| 75 | * | |
| 76 | * As noted above, we can assume a single CPU for now | |
| 77 | * but it may be multithreaded. | |
| 78 | */ | |
| 79 | ||
| 80 | static void __init msp_smtc_smp_setup(void) | |
| 81 | { | |
| 82 | /* | |
| 83 | * we won't get the definitive value until | |
| 84 | * we've run smtc_prepare_cpus later, but | |
| 85 | */ | |
| 86 | ||
| 87 | if (read_c0_config3() & (1 << 2)) | |
| 88 | smp_num_siblings = smtc_build_cpu_map(0); | |
| 89 | } | |
| 90 | ||
| 91 | static void __init msp_smtc_prepare_cpus(unsigned int max_cpus) | |
| 92 | { | |
| 93 | smtc_prepare_cpus(max_cpus); | |
| 94 | } | |
| 95 | ||
| 96 | struct plat_smp_ops msp_smtc_smp_ops = { | |
| 97 | .send_ipi_single = msp_smtc_send_ipi_single, | |
| 98 | .send_ipi_mask = msp_smtc_send_ipi_mask, | |
| 99 | .init_secondary = msp_smtc_init_secondary, | |
| 100 | .smp_finish = msp_smtc_smp_finish, | |
| 101 | .cpus_done = msp_smtc_cpus_done, | |
| 102 | .boot_secondary = msp_smtc_boot_secondary, | |
| 103 | .smp_setup = msp_smtc_smp_setup, | |
| 104 | .prepare_cpus = msp_smtc_prepare_cpus, | |
| 105 | }; |