Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <linux/mmzone.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/ioport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/console.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/edd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/dmi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/pfn.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <asm/probe_roms.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <asm/pci-direct.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <asm/e820/api.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <asm/mmzone.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <asm/sections.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <asm/setup_arch.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) static struct resource system_rom_resource = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	.name	= "System ROM",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	.start	= 0xf0000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	.end	= 0xfffff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) static struct resource extension_rom_resource = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	.name	= "Extension ROM",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	.start	= 0xe0000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	.end	= 0xeffff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) static struct resource adapter_rom_resources[] = { {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	.name 	= "Adapter ROM",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	.start	= 0xc8000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	.end	= 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	.name 	= "Adapter ROM",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	.start	= 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	.end	= 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	.name 	= "Adapter ROM",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	.start	= 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	.end	= 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	.name 	= "Adapter ROM",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	.start	= 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	.end	= 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	.name 	= "Adapter ROM",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	.start	= 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	.end	= 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	.name 	= "Adapter ROM",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	.start	= 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	.end	= 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) } };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) static struct resource video_rom_resource = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	.name 	= "Video ROM",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	.start	= 0xc0000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	.end	= 0xc7fff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	.flags	= IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) /* does this oprom support the given pci device, or any of the devices
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79)  * that the driver supports?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) static bool match_id(struct pci_dev *pdev, unsigned short vendor, unsigned short device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	struct pci_driver *drv = pdev->driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	const struct pci_device_id *id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	if (pdev->vendor == vendor && pdev->device == device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	for (id = drv ? drv->id_table : NULL; id && id->vendor; id++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		if (id->vendor == vendor && id->device == device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	return id && id->vendor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) static bool probe_list(struct pci_dev *pdev, unsigned short vendor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		       const void *rom_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	unsigned short device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		if (get_kernel_nofault(device, rom_list) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 			device = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		if (device && match_id(pdev, vendor, device))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		rom_list += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	} while (device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	return !!device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static struct resource *find_oprom(struct pci_dev *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	struct resource *oprom = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	for (i = 0; i < ARRAY_SIZE(adapter_rom_resources); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		struct resource *res = &adapter_rom_resources[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		unsigned short offset, vendor, device, list, rev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		const void *rom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		if (res->end == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		rom = isa_bus_to_virt(res->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		if (get_kernel_nofault(offset, rom + 0x18) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		if (get_kernel_nofault(vendor, rom + offset + 0x4) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		if (get_kernel_nofault(device, rom + offset + 0x6) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		if (match_id(pdev, vendor, device)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 			oprom = res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		if (get_kernel_nofault(list, rom + offset + 0x8) == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		    get_kernel_nofault(rev, rom + offset + 0xc) == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		    rev >= 3 && list &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		    probe_list(pdev, vendor, rom + offset + list)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 			oprom = res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	return oprom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) void __iomem *pci_map_biosrom(struct pci_dev *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	struct resource *oprom = find_oprom(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	if (!oprom)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	return ioremap(oprom->start, resource_size(oprom));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) EXPORT_SYMBOL(pci_map_biosrom);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) void pci_unmap_biosrom(void __iomem *image)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	iounmap(image);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) EXPORT_SYMBOL(pci_unmap_biosrom);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) size_t pci_biosrom_size(struct pci_dev *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	struct resource *oprom = find_oprom(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	return oprom ? resource_size(oprom) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) EXPORT_SYMBOL(pci_biosrom_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) #define ROMSIGNATURE 0xaa55
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) static int __init romsignature(const unsigned char *rom)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	const unsigned short * const ptr = (const unsigned short *)rom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	unsigned short sig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	return get_kernel_nofault(sig, ptr) == 0 && sig == ROMSIGNATURE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) static int __init romchecksum(const unsigned char *rom, unsigned long length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	unsigned char sum, c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	for (sum = 0; length && get_kernel_nofault(c, rom++) == 0; length--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		sum += c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	return !length && !sum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) void __init probe_roms(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	const unsigned char *rom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	unsigned long start, length, upper;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	unsigned char c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	/* video rom */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	upper = adapter_rom_resources[0].start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	for (start = video_rom_resource.start; start < upper; start += 2048) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		rom = isa_bus_to_virt(start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		if (!romsignature(rom))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		video_rom_resource.start = start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		if (get_kernel_nofault(c, rom + 2) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		/* 0 < length <= 0x7f * 512, historically */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		length = c * 512;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		/* if checksum okay, trust length byte */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		if (length && romchecksum(rom, length))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 			video_rom_resource.end = start + length - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		request_resource(&iomem_resource, &video_rom_resource);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	start = (video_rom_resource.end + 1 + 2047) & ~2047UL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	if (start < upper)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		start = upper;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	/* system rom */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	request_resource(&iomem_resource, &system_rom_resource);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	upper = system_rom_resource.start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	/* check for extension rom (ignore length byte!) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	rom = isa_bus_to_virt(extension_rom_resource.start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	if (romsignature(rom)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		length = resource_size(&extension_rom_resource);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		if (romchecksum(rom, length)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 			request_resource(&iomem_resource, &extension_rom_resource);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 			upper = extension_rom_resource.start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	/* check for adapter roms on 2k boundaries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper; start += 2048) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		rom = isa_bus_to_virt(start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		if (!romsignature(rom))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		if (get_kernel_nofault(c, rom + 2) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		/* 0 < length <= 0x7f * 512, historically */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		length = c * 512;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 		/* but accept any length that fits if checksum okay */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		if (!length || start + length > upper || !romchecksum(rom, length))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		adapter_rom_resources[i].start = start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		adapter_rom_resources[i].end = start + length - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		request_resource(&iomem_resource, &adapter_rom_resources[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		start = adapter_rom_resources[i++].end & ~2047UL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)