diff options
Diffstat (limited to 'arch/x86/pci/i386.c')
-rw-r--r-- | arch/x86/pci/i386.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index 8791fc55e715..40811efaa25a 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c | |||
@@ -31,8 +31,12 @@ | |||
31 | #include <linux/ioport.h> | 31 | #include <linux/ioport.h> |
32 | #include <linux/errno.h> | 32 | #include <linux/errno.h> |
33 | #include <linux/bootmem.h> | 33 | #include <linux/bootmem.h> |
34 | #include <linux/acpi.h> | ||
34 | 35 | ||
35 | #include <asm/pat.h> | 36 | #include <asm/pat.h> |
37 | #include <asm/hpet.h> | ||
38 | #include <asm/io_apic.h> | ||
39 | #include <asm/e820.h> | ||
36 | 40 | ||
37 | #include "pci.h" | 41 | #include "pci.h" |
38 | 42 | ||
@@ -77,6 +81,77 @@ pcibios_align_resource(void *data, struct resource *res, | |||
77 | } | 81 | } |
78 | EXPORT_SYMBOL(pcibios_align_resource); | 82 | EXPORT_SYMBOL(pcibios_align_resource); |
79 | 83 | ||
84 | static int check_res_with_valid(struct pci_dev *dev, struct resource *res) | ||
85 | { | ||
86 | unsigned long base; | ||
87 | unsigned long size; | ||
88 | int i; | ||
89 | |||
90 | base = res->start; | ||
91 | size = (res->start == 0 && res->end == res->start) ? 0 : | ||
92 | (res->end - res->start + 1); | ||
93 | |||
94 | if (!base || !size) | ||
95 | return 0; | ||
96 | |||
97 | #ifdef CONFIG_HPET_TIMER | ||
98 | /* for hpet */ | ||
99 | if (base == hpet_address && (res->flags & IORESOURCE_MEM)) { | ||
100 | dev_info(&dev->dev, "BAR has HPET at %08lx-%08lx\n", | ||
101 | base, base + size - 1); | ||
102 | return 1; | ||
103 | } | ||
104 | #endif | ||
105 | |||
106 | #ifdef CONFIG_X86_IO_APIC | ||
107 | for (i = 0; i < nr_ioapics; i++) { | ||
108 | unsigned long ioapic_phys = mp_ioapics[i].mp_apicaddr; | ||
109 | |||
110 | if (base == ioapic_phys && (res->flags & IORESOURCE_MEM)) { | ||
111 | dev_info(&dev->dev, "BAR has ioapic at %08lx-%08lx\n", | ||
112 | base, base + size - 1); | ||
113 | return 1; | ||
114 | } | ||
115 | } | ||
116 | #endif | ||
117 | |||
118 | #ifdef CONFIG_PCI_MMCONFIG | ||
119 | for (i = 0; i < pci_mmcfg_config_num; i++) { | ||
120 | unsigned long addr; | ||
121 | |||
122 | addr = pci_mmcfg_config[i].address; | ||
123 | if (base == addr && (res->flags & IORESOURCE_MEM)) { | ||
124 | dev_info(&dev->dev, "BAR has MMCONFIG at %08lx-%08lx\n", | ||
125 | base, base + size - 1); | ||
126 | return 1; | ||
127 | } | ||
128 | } | ||
129 | #endif | ||
130 | |||
131 | return 0; | ||
132 | } | ||
133 | |||
134 | static int check_platform(struct pci_dev *dev, struct resource *res) | ||
135 | { | ||
136 | struct resource *root = NULL; | ||
137 | |||
138 | /* | ||
139 | * forcibly insert it into the | ||
140 | * resource tree | ||
141 | */ | ||
142 | if (res->flags & IORESOURCE_MEM) | ||
143 | root = &iomem_resource; | ||
144 | else if (res->flags & IORESOURCE_IO) | ||
145 | root = &ioport_resource; | ||
146 | |||
147 | if (root && check_res_with_valid(dev, res)) { | ||
148 | insert_resource(root, res); | ||
149 | |||
150 | return 1; | ||
151 | } | ||
152 | |||
153 | return 0; | ||
154 | } | ||
80 | /* | 155 | /* |
81 | * Handle resources of PCI devices. If the world were perfect, we could | 156 | * Handle resources of PCI devices. If the world were perfect, we could |
82 | * just allocate all the resource regions and do nothing more. It isn't. | 157 | * just allocate all the resource regions and do nothing more. It isn't. |
@@ -128,6 +203,8 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list) | |||
128 | pr = pci_find_parent_resource(dev, r); | 203 | pr = pci_find_parent_resource(dev, r); |
129 | if (!r->start || !pr || | 204 | if (!r->start || !pr || |
130 | request_resource(pr, r) < 0) { | 205 | request_resource(pr, r) < 0) { |
206 | if (check_platform(dev, r)) | ||
207 | continue; | ||
131 | dev_err(&dev->dev, "BAR %d: can't allocate resource\n", idx); | 208 | dev_err(&dev->dev, "BAR %d: can't allocate resource\n", idx); |
132 | /* | 209 | /* |
133 | * Something is wrong with the region. | 210 | * Something is wrong with the region. |
@@ -169,6 +246,8 @@ static void __init pcibios_allocate_resources(int pass) | |||
169 | r->flags, disabled, pass); | 246 | r->flags, disabled, pass); |
170 | pr = pci_find_parent_resource(dev, r); | 247 | pr = pci_find_parent_resource(dev, r); |
171 | if (!pr || request_resource(pr, r) < 0) { | 248 | if (!pr || request_resource(pr, r) < 0) { |
249 | if (check_platform(dev, r)) | ||
250 | continue; | ||
172 | dev_err(&dev->dev, "BAR %d: can't allocate resource\n", idx); | 251 | dev_err(&dev->dev, "BAR %d: can't allocate resource\n", idx); |
173 | /* We'll assign a new address later */ | 252 | /* We'll assign a new address later */ |
174 | r->end -= r->start; | 253 | r->end -= r->start; |