diff options
Diffstat (limited to 'qemu/roms/openbios/drivers/iommu.c')
| -rw-r--r-- | qemu/roms/openbios/drivers/iommu.c | 207 |
1 files changed, 0 insertions, 207 deletions
diff --git a/qemu/roms/openbios/drivers/iommu.c b/qemu/roms/openbios/drivers/iommu.c deleted file mode 100644 index cd9a64bb6..000000000 --- a/qemu/roms/openbios/drivers/iommu.c +++ /dev/null @@ -1,207 +0,0 @@ -/** - ** Proll (PROM replacement) - ** iommu.c: Functions for DVMA management. - ** Copyright 1999 Pete Zaitcev - ** This code is licensed under GNU General Public License. - **/ -#include "config.h" -#include "libopenbios/bindings.h" -#include "libopenbios/ofmem.h" -#include "drivers/drivers.h" -#include "iommu.h" -#include "arch/sparc32/ofmem_sparc32.h" - -#ifdef CONFIG_DEBUG_IOMMU -#define DPRINTF(fmt, args...) \ - do { printk(fmt , ##args); } while (0) -#else -#define DPRINTF(fmt, args...) -#endif - -/* - * IOMMU parameters - */ -struct iommu { - struct iommu_regs *regs; - unsigned int *page_table; - unsigned long plow; /* Base bus address */ -}; - -static struct iommu ciommu; - -static void -iommu_invalidate(struct iommu_regs *iregs) -{ - iregs->tlbflush = 0; -} - -/* - * XXX This is a problematic interface. We alloc _memory_ which is uncached. - * So if we ever reuse allocations somebody is going to get uncached pages. - * Returned address is always aligned by page. - * BTW, we were not going to give away anonymous storage, were we not? - */ -void * -dvma_alloc(int size, unsigned int *pphys) -{ - void *va; - unsigned int pa, ba; - unsigned int npages; - unsigned int mva, mpa; - unsigned int i; - unsigned int *iopte; - struct iommu *t = &ciommu; - int ret; - - npages = (size + (PAGE_SIZE-1)) / PAGE_SIZE; - ret = ofmem_posix_memalign(&va, npages * PAGE_SIZE, PAGE_SIZE); - if (ret != 0) - return NULL; - - ba = (unsigned int)mem_alloc(&cdvmem, npages * PAGE_SIZE, PAGE_SIZE); - if (ba == 0) - return NULL; - - pa = (unsigned int)va2pa((unsigned long)va); - - /* - * Change page attributes in MMU to uncached. - */ - mva = (unsigned int) va; - mpa = (unsigned int) pa; - ofmem_arch_map_pages(mpa, mva, npages * PAGE_SIZE, ofmem_arch_io_translation_mode(mpa)); - - /* - * Map into IOMMU page table. - */ - mpa = (unsigned int) pa; - iopte = &t->page_table[(ba - t->plow) / PAGE_SIZE]; - for (i = 0; i < npages; i++) { - *iopte++ = MKIOPTE(mpa); - mpa += PAGE_SIZE; - } - - *pphys = ba; - - return va; -} - -/* - * Initialize IOMMU - * This looks like initialization of CPU MMU but - * the routine is higher in food chain. - */ -static struct iommu_regs * -iommu_init(struct iommu *t, uint64_t base) -{ - unsigned int *ptab; - int ptsize; -#ifdef CONFIG_DEBUG_IOMMU - unsigned int impl, vers; -#endif - unsigned int tmp; - struct iommu_regs *regs; - int ret; - unsigned long vasize; - - regs = (struct iommu_regs *)ofmem_map_io(base, IOMMU_REGS); - if (regs == NULL) { - DPRINTF("Cannot map IOMMU\n"); - for (;;) { } - } - t->regs = regs; -#ifdef CONFIG_DEBUG_IOMMU - impl = (regs->control & IOMMU_CTRL_IMPL) >> 28; - vers = (regs->control & IOMMU_CTRL_VERS) >> 24; -#endif - - tmp = regs->control; - tmp &= ~(IOMMU_CTRL_RNGE); - - tmp |= (IOMMU_RNGE_32MB | IOMMU_CTRL_ENAB); - t->plow = 0xfe000000; /* End - 32 MB */ - /* Size of VA region that we manage */ - vasize = 0x2000000; /* 32 MB */ - - regs->control = tmp; - iommu_invalidate(regs); - - /* Allocate IOMMU page table */ - /* Tremendous alignment causes great waste... */ - ptsize = (vasize / PAGE_SIZE) * sizeof(int); - ret = ofmem_posix_memalign((void *)&ptab, ptsize, ptsize); - if (ret != 0) { - DPRINTF("Cannot allocate IOMMU table [0x%x]\n", ptsize); - for (;;) { } - } - t->page_table = ptab; - - /* flush_cache_all(); */ - /** flush_tlb_all(); **/ - tmp = (unsigned int)va2pa((unsigned long)ptab); - regs->base = tmp >> 4; - iommu_invalidate(regs); - - DPRINTF("IOMMU: impl %d vers %d page table at 0x%p (pa 0x%x) of size %d bytes\n", - impl, vers, t->page_table, tmp, ptsize); - - mem_init(&cdvmem, (char*)t->plow, (char *)0xfffff000); - return regs; -} - -/* ( addr.lo addr.hi size -- virt ) */ - -static void -ob_iommu_map_in(void) -{ - phys_addr_t phys; - ucell size, virt; - - size = POP(); - phys = POP(); - phys = (phys << 32) + POP(); - - virt = ofmem_map_io(phys, size); - - PUSH(virt); -} - -/* ( virt size ) */ - -static void -ob_iommu_map_out(void) -{ - ucell size = POP(); - ucell virt = POP(); - - ofmem_release_io(virt, size); -} - -void -ob_init_iommu(uint64_t base) -{ - struct iommu_regs *regs; - - regs = iommu_init(&ciommu, base); - - push_str("/iommu"); - fword("find-device"); - PUSH((unsigned long)regs); - fword("encode-int"); - push_str("address"); - fword("property"); - - PUSH(base >> 32); - fword("encode-int"); - PUSH(base & 0xffffffff); - fword("encode-int"); - fword("encode+"); - PUSH(IOMMU_REGS); - fword("encode-int"); - fword("encode+"); - push_str("reg"); - fword("property"); - - bind_func("map-in", ob_iommu_map_in); - bind_func("map-out", ob_iommu_map_out); -} |