1 /* $NetBSD: vmparam.h,v 1.22 2019/03/29 12:51:15 christos 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 its 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_BOTTOMUP(da, sz) \ 29 round_page((vaddr_t)(da) + (vsize_t)maxdmap) 30 31 /* 32 * If we are a module or a modular kernel, then we need to defined the range 33 * of our varible page sizes since BOOKE and OEA use 4KB pages while IBM4XX 34 * use 16KB pages. 35 */ 36 #define MIN_PAGE_SHIFT 12 /* BOOKE/OEA */ 37 #define MAX_PAGE_SHIFT 14 /* IBM4XX */ 38 #define MIN_PAGE_SIZE (1 << MIN_PAGE_SHIFT) 39 #define MAX_PAGE_SIZE (1 << MAX_PAGE_SHIFT) 40 41 #if defined(_MODULE) 42 #if defined(_RUMPKERNEL) 43 /* 44 * Safe definitions for RUMP kernels 45 */ 46 #define VM_MAXUSER_ADDRESS 0x7fff8000 47 #define VM_MIN_ADDRESS 0x00000000 48 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 49 #define MAXDSIZ (1024*1024*1024) 50 #define MAXSSIZ (32*1024*1024) 51 #define MAXTSIZ (256*1024*1024) 52 #else /* !_RUMPKERNEL */ 53 /* 54 * Some modules need some of the constants but those vary between the variants 55 * so those constants are exported as linker symbols so they don't take up any 56 * space but also avoid an extra load to put into a register. 57 */ 58 extern const char __USRSTACK; /* let the linker resolve it */ 59 60 #define USRSTACK ((vaddr_t)(uintptr_t)&__USRSTACK) 61 #endif /* !_RUMPKERNEL */ 62 63 #else /* !_MODULE */ 64 65 #if defined(PPC_BOOKE) 66 #include <powerpc/booke/vmparam.h> 67 #elif defined(PPC_IBM4XX) 68 #include <powerpc/ibm4xx/vmparam.h> 69 #elif defined(PPC_OEA) || defined (PPC_OEA64) || defined (PPC_OEA64_BRIDGE) 70 #include <powerpc/oea/vmparam.h> 71 #elif defined(_KERNEL) 72 #error unknown PPC variant 73 #endif 74 75 #endif /* !_MODULE */ 76 77 #if defined(MODULAR) || defined(_MODULAR) 78 /* 79 * If we are a module or support modules, we need to define a compatible 80 * pmap_physseg since IBM4XX uses one. This will waste a tiny of space 81 * but is needed for compatibility. 82 */ 83 #ifndef __HAVE_PMAP_PHYSSEG 84 #define __HAVE_PMAP_PHYSSEG 85 struct pmap_physseg { 86 uintptr_t pmseg_dummy[2]; 87 }; 88 #endif 89 90 __CTASSERT(sizeof(struct pmap_physseg) == sizeof(uintptr_t) * 2); 91 #endif /* MODULAR || _MODULE */ 92 93 #endif /* !_POWERPC_VMPARAM_H_ */ 94