1 | /* |
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2 | * Machine specific setup for generic |
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3 | */ |
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4 | |
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5 | #include <linux/smp.h> |
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6 | #include <linux/init.h> |
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7 | #include <linux/interrupt.h> |
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8 | #include <linux/module.h> |
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9 | #include <asm/acpi.h> |
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10 | #include <asm/arch_hooks.h> |
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11 | #include <asm/e820.h> |
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12 | #include <asm/setup.h> |
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13 | #include <asm/fixmap.h> |
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14 | |
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15 | #include <xen/interface/callback.h> |
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16 | #include <xen/interface/memory.h> |
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17 | |
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18 | #ifdef CONFIG_HOTPLUG_CPU |
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19 | #define DEFAULT_SEND_IPI (1) |
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20 | #else |
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21 | #define DEFAULT_SEND_IPI (0) |
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22 | #endif |
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23 | |
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24 | int no_broadcast=DEFAULT_SEND_IPI; |
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25 | |
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26 | static __init int no_ipi_broadcast(char *str) |
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27 | { |
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28 | get_option(&str, &no_broadcast); |
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29 | printk ("Using %s mode\n", no_broadcast ? "No IPI Broadcast" : |
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30 | "IPI Broadcast"); |
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31 | return 1; |
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32 | } |
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33 | |
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34 | __setup("no_ipi_broadcast", no_ipi_broadcast); |
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35 | |
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36 | static int __init print_ipi_mode(void) |
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37 | { |
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38 | printk ("Using IPI %s mode\n", no_broadcast ? "No-Shortcut" : |
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39 | "Shortcut"); |
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40 | return 0; |
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41 | } |
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42 | |
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43 | late_initcall(print_ipi_mode); |
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44 | |
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45 | /** |
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46 | * machine_specific_memory_setup - Hook for machine specific memory setup. |
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47 | * |
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48 | * Description: |
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49 | * This is included late in kernel/setup.c so that it can make |
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50 | * use of all of the static functions. |
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51 | **/ |
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52 | |
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53 | char * __init machine_specific_memory_setup(void) |
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54 | { |
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55 | int rc; |
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56 | struct xen_memory_map memmap; |
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57 | /* |
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58 | * This is rather large for a stack variable but this early in |
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59 | * the boot process we know we have plenty slack space. |
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60 | */ |
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61 | struct e820entry map[E820MAX]; |
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62 | |
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63 | memmap.nr_entries = E820MAX; |
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64 | set_xen_guest_handle(memmap.buffer, map); |
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65 | |
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66 | rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap); |
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67 | if ( rc == -ENOSYS ) { |
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68 | memmap.nr_entries = 1; |
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69 | map[0].addr = 0ULL; |
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70 | map[0].size = PFN_PHYS((unsigned long long)xen_start_info->nr_pages); |
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71 | /* 8MB slack (to balance backend allocations). */ |
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72 | map[0].size += 8ULL << 20; |
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73 | map[0].type = E820_RAM; |
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74 | rc = 0; |
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75 | } |
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76 | BUG_ON(rc); |
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77 | |
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78 | sanitize_e820_map(map, (char *)&memmap.nr_entries); |
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79 | |
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80 | BUG_ON(copy_e820_map(map, (char)memmap.nr_entries) < 0); |
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81 | |
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82 | return "Xen"; |
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83 | } |
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84 | |
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85 | |
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86 | extern void hypervisor_callback(void); |
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87 | extern void failsafe_callback(void); |
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88 | extern void nmi(void); |
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89 | |
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90 | unsigned long *machine_to_phys_mapping; |
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91 | EXPORT_SYMBOL(machine_to_phys_mapping); |
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92 | unsigned int machine_to_phys_order; |
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93 | EXPORT_SYMBOL(machine_to_phys_order); |
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94 | |
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95 | void __init machine_specific_arch_setup(void) |
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96 | { |
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97 | int ret; |
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98 | struct xen_machphys_mapping mapping; |
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99 | unsigned long machine_to_phys_nr_ents; |
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100 | struct xen_platform_parameters pp; |
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101 | static struct callback_register __initdata event = { |
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102 | .type = CALLBACKTYPE_event, |
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103 | .address = { __KERNEL_CS, (unsigned long)hypervisor_callback }, |
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104 | }; |
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105 | static struct callback_register __initdata failsafe = { |
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106 | .type = CALLBACKTYPE_failsafe, |
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107 | .address = { __KERNEL_CS, (unsigned long)failsafe_callback }, |
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108 | }; |
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109 | static struct callback_register __initdata nmi_cb = { |
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110 | .type = CALLBACKTYPE_nmi, |
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111 | .address = { __KERNEL_CS, (unsigned long)nmi }, |
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112 | }; |
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113 | |
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114 | ret = HYPERVISOR_callback_op(CALLBACKOP_register, &event); |
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115 | if (ret == 0) |
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116 | ret = HYPERVISOR_callback_op(CALLBACKOP_register, &failsafe); |
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117 | #if CONFIG_XEN_COMPAT <= 0x030002 |
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118 | if (ret == -ENOSYS) |
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119 | ret = HYPERVISOR_set_callbacks( |
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120 | event.address.cs, event.address.eip, |
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121 | failsafe.address.cs, failsafe.address.eip); |
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122 | #endif |
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123 | BUG_ON(ret); |
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124 | |
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125 | ret = HYPERVISOR_callback_op(CALLBACKOP_register, &nmi_cb); |
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126 | #if CONFIG_XEN_COMPAT <= 0x030002 |
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127 | if (ret == -ENOSYS) { |
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128 | static struct xennmi_callback __initdata cb = { |
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129 | .handler_address = (unsigned long)nmi |
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130 | }; |
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131 | |
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132 | HYPERVISOR_nmi_op(XENNMI_register_callback, &cb); |
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133 | } |
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134 | #endif |
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135 | |
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136 | if (HYPERVISOR_xen_version(XENVER_platform_parameters, &pp) == 0) |
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137 | set_fixaddr_top(pp.virt_start); |
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138 | |
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139 | machine_to_phys_mapping = (unsigned long *)MACH2PHYS_VIRT_START; |
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140 | machine_to_phys_nr_ents = MACH2PHYS_NR_ENTRIES; |
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141 | if (HYPERVISOR_memory_op(XENMEM_machphys_mapping, &mapping) == 0) { |
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142 | machine_to_phys_mapping = (unsigned long *)mapping.v_start; |
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143 | machine_to_phys_nr_ents = mapping.max_mfn + 1; |
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144 | } |
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145 | while ((1UL << machine_to_phys_order) < machine_to_phys_nr_ents ) |
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146 | machine_to_phys_order++; |
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147 | } |
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