1 /* $NetBSD: vmparam.h,v 1.16 2011/06/20 21:45:16 matt Exp $ */ 2 3 #ifndef _POWERPC_VMPARAM_H_ 4 #define _POWERPC_VMPARAM_H_ 5 6 #ifdef _KERNEL_OPT 7 #include "opt_modular.h" 8 #include "opt_ppcarch.h" 9 #include "opt_uvm.h" 10 #endif 11 12 /* 13 * These are common for BOOKE, IBM4XX, and OEA 14 */ 15 #define VM_FREELIST_DEFAULT 0 16 #define VM_FREELIST_FIRST256 1 17 #define VM_FREELIST_FIRST16 2 18 #define VM_NFREELIST 3 19 20 #define VM_PHYSSEG_MAX 16 21 22 /* 23 * The address to which unspecified mapping requests default 24 * Put the stack in it's own segment and start mmaping at the 25 * top of the next lower segment. 26 */ 27 #define __USE_TOPDOWN_VM 28 #define VM_DEFAULT_ADDRESS(da, sz) \ 29 ((VM_MAXUSER_ADDRESS - MAXSSIZ) - round_page(sz)) 30 31 #if defined(_MODULE) 32 /* 33 * If we are a module, then we need with varible page sizes since BOOKE and OEA 34 * use 4KB pages while IBM4XX use 16KB pages. 35 */ 36 #define MIN_PAGE_SIZE 4096 /* BOOKE/OEA */ 37 #define MAX_PAGE_SIZE 16384 /* IBM4XX */ 38 39 #if defined(_RUMPKERNEL) 40 /* 41 * Safe definitions for RUMP kernels 42 */ 43 #define VM_MAXUSER_ADDRESS 0x7fff8000 44 #define VM_MIN_ADDRESS 0x00000000 45 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 46 #define MAXDSIZ (1024*1024*1024) 47 #define MAXSSIZ (32*1024*1024) 48 #define MAXTSIZ (256*1024*1024) 49 #else /* !_RUMPKERNEL */ 50 /* 51 * Some modules need some of the constants but those vary between the variants 52 * so those constants are exported as linker symbols so they don't take up any 53 * space but also avoid an extra load to put into a register. 54 */ 55 extern const char __USRSTACK; /* let the linker resolve it */ 56 57 #define USRSTACK ((vaddr_t)(uintptr_t)&__USRSTACK) 58 #endif /* !_RUMPKERNEL */ 59 60 #else /* !_MODULE */ 61 62 #if defined(PPC_BOOKE) 63 #include <powerpc/booke/vmparam.h> 64 #elif defined(PPC_IBM4XX) 65 #include <powerpc/ibm4xx/vmparam.h> 66 #elif defined(PPC_OEA) || defined (PPC_OEA64) || defined (PPC_OEA64_BRIDGE) 67 #include <powerpc/oea/vmparam.h> 68 #elif defined(_KERNEL) 69 #error unknown PPC variant 70 #endif 71 72 #endif /* !_MODULE */ 73 74 #if defined(MODULAR) || defined(_MODULAR) 75 /* 76 * If we are a module or support modules, we need to define a compatible 77 * pmap_physseg since IBM4XX uses one. This will waste a tiny of space 78 * but is needed for compatibility. 79 */ 80 #ifndef __HAVE_PMAP_PHYSSEG 81 #define __HAVE_PMAP_PHYSSEG 82 struct pmap_physseg { 83 uintptr_t pmseg_dummy[2]; 84 }; 85 #endif 86 87 __CTASSERT(sizeof(struct pmap_physseg) == sizeof(uintptr_t) * 2); 88 #endif /* MODULAR || _MODULE */ 89 90 #endif /* !_POWERPC_VMPARAM_H_ */ 91