1 /* $NetBSD: vmparam.h,v 1.26 2022/05/11 13:58:43 andvar 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 #endif 10 11 /* 12 * These are common for BOOKE, IBM4XX, and OEA 13 */ 14 #define VM_FREELIST_DEFAULT 0 15 #define VM_FREELIST_FIRST256 1 16 #define VM_FREELIST_FIRST16 2 17 #define VM_NFREELIST 3 18 19 #define VM_PHYSSEG_MAX 16 20 21 /* 22 * The address to which unspecified mapping requests default 23 * Put the stack in its own segment and start mmaping at the 24 * top of the next lower segment. 25 */ 26 #define __USE_TOPDOWN_VM 27 #define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \ 28 round_page((vaddr_t)(da) + (vsize_t)maxdmap) 29 30 #if defined(MODULAR) || defined(_MODULE) || !defined(_KERNEL) 31 /* 32 * If we are a module or a modular kernel, then we need to defined the range 33 * of our variable page sizes since BOOKE and OEA use 4KB pages while IBM4XX 34 * use 16KB pages. 35 * This is also required for userland by jemalloc. 36 */ 37 #define MIN_PAGE_SHIFT 12 /* BOOKE/OEA */ 38 #define MAX_PAGE_SHIFT 14 /* IBM4XX */ 39 #define MIN_PAGE_SIZE (1 << MIN_PAGE_SHIFT) 40 #define MAX_PAGE_SIZE (1 << MAX_PAGE_SHIFT) 41 #endif /* MODULAR || _MODULE || !_KERNEL */ 42 43 #if defined(_MODULE) 44 #if defined(_RUMPKERNEL) 45 /* 46 * Safe definitions for RUMP kernels 47 */ 48 #define VM_MAXUSER_ADDRESS 0x7fff8000 49 #define VM_MIN_ADDRESS 0x00000000 50 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 51 #define MAXDSIZ (1024*1024*1024) 52 #define MAXSSIZ (32*1024*1024) 53 #define MAXTSIZ (256*1024*1024) 54 #else /* !_RUMPKERNEL */ 55 /* 56 * Some modules need some of the constants but those vary between the variants 57 * so those constants are exported as linker symbols so they don't take up any 58 * space but also avoid an extra load to put into a register. 59 */ 60 extern const char __USRSTACK; /* let the linker resolve it */ 61 62 #define USRSTACK ((vaddr_t)(uintptr_t)&__USRSTACK) 63 #endif /* !_RUMPKERNEL */ 64 65 #else /* !_MODULE */ 66 67 #if defined(PPC_BOOKE) 68 #include <powerpc/booke/vmparam.h> 69 #elif defined(PPC_IBM4XX) 70 #include <powerpc/ibm4xx/vmparam.h> 71 #elif defined(PPC_OEA) || defined (PPC_OEA64) || defined (PPC_OEA64_BRIDGE) 72 #include <powerpc/oea/vmparam.h> 73 #elif defined(_KERNEL) 74 #error unknown PPC variant 75 #endif 76 77 #endif /* !_MODULE */ 78 79 #if defined(MODULAR) || defined(_MODULE) 80 /* 81 * If we are a module or support modules, we need to define a compatible 82 * pmap_physseg since IBM4XX uses one. This will waste a tiny of space 83 * but is needed for compatibility. 84 */ 85 #ifndef __HAVE_PMAP_PHYSSEG 86 #define __HAVE_PMAP_PHYSSEG 87 struct pmap_physseg { 88 uintptr_t pmseg_dummy[2]; 89 }; 90 #endif 91 92 __CTASSERT(sizeof(struct pmap_physseg) == sizeof(uintptr_t) * 2); 93 #endif /* MODULAR || _MODULE */ 94 95 #endif /* !_POWERPC_VMPARAM_H_ */ 96