910aa1c3e1
This commit introduces message fields, library calls and their calls in libminxfs for using the new secondary cache, without actually including that functionality yet. This is to make bisecting problems that might not be due to the new cache code and reading the patches easier, and forces the fallback in libminixfs to be working in the absence of the secondary cache functionality. Change-Id: I76fc5242864db63d134f86d1ce1446b0072ea337
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
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#include "syslib.h"
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#include <string.h>
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#include <assert.h>
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#include <sys/mman.h>
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#include <minix/vm.h>
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#include <minix/sysutil.h>
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#include <machine/vmparam.h>
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int vm_cachecall(message *m, int call, void *addr, u32_t dev, u64_t dev_offset,
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u64_t ino, u64_t ino_offset, u32_t *flags, int blocksize)
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{
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if(blocksize % PAGE_SIZE)
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panic("blocksize %d should be a multiple of pagesize %d\n",
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blocksize, PAGE_SIZE);
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if(ino_offset % PAGE_SIZE)
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panic("inode offset %d should be a multiple of pagesize %d\n",
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ino_offset, PAGE_SIZE);
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if(dev_offset % PAGE_SIZE)
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panic("dev offset offset %d should be a multiple of pagesize %d\n",
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dev_offset, PAGE_SIZE);
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memset(m, 0, sizeof(*m));
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assert(dev != NO_DEV);
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m->m_u.m_vmmcp.dev_offset_pages = dev_offset/PAGE_SIZE;
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m->m_u.m_vmmcp.ino_offset_pages = ino_offset/PAGE_SIZE;
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m->m_u.m_vmmcp.ino = ino;
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m->m_u.m_vmmcp.block = addr;
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m->m_u.m_vmmcp.flags_ptr = flags;
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m->m_u.m_vmmcp.dev = dev;
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m->m_u.m_vmmcp.pages = blocksize / PAGE_SIZE;
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m->m_u.m_vmmcp.flags = 0;
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return _taskcall(VM_PROC_NR, call, m);
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}
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void *vm_map_cacheblock(u32_t dev, u64_t dev_offset,
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u64_t ino, u64_t ino_offset, u32_t *flags, int blocksize)
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{
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message m;
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if(vm_cachecall(&m, VM_MAPCACHEPAGE, NULL, dev, dev_offset,
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ino, ino_offset, flags, blocksize) != OK)
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return MAP_FAILED;
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return m.m_u.m_vmmcp_reply.addr;
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}
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int vm_set_cacheblock(void *block, u32_t dev, u64_t dev_offset,
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u64_t ino, u64_t ino_offset, u32_t *flags, int blocksize)
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{
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message m;
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return vm_cachecall(&m, VM_SETCACHEPAGE, block, dev, dev_offset,
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ino, ino_offset, flags, blocksize);
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}
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