* Comments on how mmu will be set up in the bootloader
* Add aranym native feature helper funcs. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23526 a95241bf-73f2-0310-859d-f6bbb57e9c96
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François Revol
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@ -21,6 +21,7 @@
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#include <string.h>
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//XXX: x86
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/** The (physical) memory layout of the boot loader is currently as follows:
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* 0x0500 - 0x10000 protected mode stack
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* 0x0500 - 0x09000 real mode stack
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@ -41,7 +42,36 @@
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* the kernel itself (see kMaxKernelSize).
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*/
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//#define TRACE_MMU
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// notes m68k:
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/** The (physical) memory layout of the boot loader is currently as follows:
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* 0x0800 - 0x10000 supervisor mode stack (1) XXX: more ? x86 starts at 500
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* 0x10000 - ? code (up to ~500 kB)
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* unused (TT0 instead):
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* 0x90000 1st temporary page table (identity maps 0-4 MB)
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* 0x91000 2nd (4-8 MB)
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*
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* 0x92000 - 0x92000 further page tables
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* 0x100000 page directory
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* ... boot loader heap (32 kB)
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* ... free physical memory
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* [0xa00000] end of chip RAM for TT (falcon has more till ROM)
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* [0xe00000 - 0xf00000 TOS ROM]
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* [0xf00000 - 0x1000000 I/O]
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XXX: where is the video buffer ?
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*
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* The first 16 MB (2) are identity mapped (0x0 - 0x1000000); paging
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* is turned on. The kernel is mapped at 0x80000000, all other stuff
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* mapped by the loader (kernel args, modules, driver settings, ...)
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* comes after 0x81000000 which means that there is currently only
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* 1 MB reserved for the kernel itself (see kMaxKernelSize).
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*
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* (1) no need for user stack, we are already in supervisor mode in the
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* loader.
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* (2) maps the whole regular ST space; transparent translation registers
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* have larger granularity anyway;
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*/
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#define TRACE_MMU
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#ifdef TRACE_MMU
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# define TRACE(x) dprintf x
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#else
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@ -60,7 +90,12 @@ static addr_t sMaxVirtualAddress = KERNEL_BASE + 0x400000;
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static addr_t sNextPageTableAddress = 0x90000;
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static const uint32 kPageTableRegionEnd = 0x9e000;
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// we need to reserve 2 pages for the SMP trampoline code
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// we need to reserve 2 pages for the SMP trampoline code XXX:no
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extern struct boot_mmu_ops k030MMUOps;
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extern struct boot_mmu_ops k040MMUOps;
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//extern struct boot_mmu_ops k060MMUOps;
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static struct boot_mmu_ops *gMMUOps;
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static addr_t
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get_next_virtual_address(size_t size)
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@ -260,6 +295,8 @@ init_page_directory(void)
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{
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TRACE(("init_page_directory\n"));
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gMMUOps->load_rp();
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gMMUOps->enable_paging();
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#if 0
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// allocate a new pgdir
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sPageDirectory = (uint32 *)get_next_physical_page();
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@ -405,6 +442,13 @@ extern "C" void
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mmu_init_for_kernel(void)
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{
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TRACE(("mmu_init_for_kernel\n"));
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// remove identity mapping of ST space
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gMMUOps->set_tt(0, NULL, 0, 0);
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#if 0
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// set up a new idt
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{
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@ -23,8 +23,11 @@ extern void *mmu_allocate(void *virtualAddress, size_t size);
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extern void mmu_free(void *virtualAddress, size_t size);
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struct boot_mmu_ops {
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// len=0 to disable
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/* len=0 to disable */
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status_t (*set_tt)(int which, addr_t pa, size_t len, uint32 perms);
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/* load root pointers */
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status_t (*load_rp)(XXX);
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status_t (*enable_paging)(void);
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};
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@ -13,6 +13,14 @@
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extern "C" {
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#endif
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#ifndef __ASSEMBLER__
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#include <OS.h>
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#endif
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/*
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* Atari BIOS calls
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*/
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/* those are used by asm code too */
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#define DEV_PRINTER 0
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@ -37,19 +45,8 @@ extern "C" {
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#define RW_NORETRY 0x04
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#define RW_NOTRANSLATE 0x08
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#define SUP_USER 0
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#define SUP_SUPER 1
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#define SUP_SET 0
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#define SUP_INQUIRE 1
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#ifndef __ASSEMBLER__
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#include <OS.h>
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/*
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* Atari BIOS calls
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*/
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extern int32 bios(uint16 nr, ...);
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// cf. http://www.fortunecity.com/skyscraper/apple/308/html/bios.htm
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@ -92,12 +89,12 @@ static inline int Bconputs(int16 handle, const char *string)
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return i;
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}
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#endif /* __ASSEMBLER__ */
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/*
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* Atari XBIOS calls
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*/
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extern int32 xbios(uint16 nr, ...);
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#define IM_DISABLE 0
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#define IM_RELATIVE 1
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#define IM_ABSOLUTE 2
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@ -106,6 +103,20 @@ extern int32 xbios(uint16 nr, ...);
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#define NVM_READ 0
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#define NVM_WRITE 1
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#define NVM_RESET 2
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// unofficial
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#define NVM_R_SEC 0
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#define NVM_R_MIN 2
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#define NVM_R_HOUR 4
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#define NVM_R_MDAY 7
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#define NVM_R_MON 8 /*+- 1*/
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#define NVM_R_YEAR 9
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#define NVM_R_VIDEO 29
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#ifndef __ASSEMBLER__
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extern int32 xbios(uint16 nr, ...);
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#define Initmous(mode, param, vec) xbios(0, (int16)mode, (void *)param, (void *)vec)
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#define Physbase() (void *)xbios(2)
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@ -130,23 +141,36 @@ extern int32 xbios(uint16 nr, ...);
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#define Locksnd() xbios(128)
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#define Unlocksnd() xbios(129)
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#endif /* __ASSEMBLER__ */
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/*
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* Atari GEMDOS calls
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*/
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#define SUP_USER 0
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#define SUP_SUPER 1
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#ifdef __ASSEMBLER__
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#define SUP_SET 0
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#define SUP_INQUIRE 1
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#else
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extern int32 gemdos(uint16 nr, ...);
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#undef SUP_SET
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#undef SUP_INQUIRE
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#define SUP_SET (void *)0
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#define SUP_INQUIRE (void *)1
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// official names
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#define Pterm0() gemdos(0)
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#define Cconin() gemdos(1)
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#define Super(a) gemdos(0x20, (uint32)a)
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#define Super(s) gemdos(0x20, (uint32)s)
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#define Pterm(retcode) gemdos(76, (int16)retcode)
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#endif /* __ASSEMBLER__ */
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#ifdef __ASSEMBLER__
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/*
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* error mapping
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* in debug.c
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@ -208,6 +232,58 @@ static inline const struct tos_osheader *tos_get_osheader()
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#endif /* __ASSEMBLER__ */
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/*
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* XHDI
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*/
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/*
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* ARAnyM Native Features
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*/
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#define NF_COOKIE 0x5f5f4e46L //'__NF'
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#define NF_MAGIC 0x20021021L
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typedef struct {
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long magic;
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long (*nfGetID) (const char *);
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long (*nfCall) (long ID, ...);
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} NatFeatCookie;
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extern NatFeatCookie *gNatFeatCookie;
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static inline NatFeatCookie *nat_features(void)
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{
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if (gNatFeatCookie == (void *)-1 || !gNatFeatCookie)
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return NULL;
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gNatFeatCookie = tos_find_cookie(NF_COOKIE);
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if (!gNatFeatCookie || gNatFeatCookie->magic != NF_MAGIC) {
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gNatFeatCookie = (void *)-1;
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return NULL;
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}
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return c;
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}
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/* XHDI NatFeat */
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#define NF_XHDI "XHDI"
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#define nfxhdi(code, a...) \
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{ \
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gNatFeatCookie->nfCall((uint32)
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if (gNatFeatCookie == NULL) {
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c = tos_find_cookie(NF_COOKIE);
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if (!c || c->magic != NF_MAGIC)
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return NULL;
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return c;
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}
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#define NFXHversion() nfxhdi(0)
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#endif /* __ASSEMBLER__ */
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#ifdef __cplusplus
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}
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#endif
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