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preparation for /dev/random

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This commit is contained in:
Ben Gras 2005-04-22 13:25:17 +00:00
parent 6019a0a5d0
commit d252971b90
1 changed files with 15 additions and 2 deletions
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17
drivers/memory/memory.c
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@ -20,13 +20,16 @@
#include <ibm/int86.h>
#endif
#define NR_DEVS 5 /* number of RAM-type devices */
#define NR_DEVS 6 /* number of RAM-type devices */
PRIVATE struct device m_geom[NR_DEVS]; /* base and size of each RAM disk */
PRIVATE int m_device; /* current device */
PRIVATE struct kenviron kenv; /* need protected_mode */
PRIVATE struct psinfo psinfo = { NR_TASKS, NR_PROCS, 0, 0, 0 };
#define RANDOM_BUFFER_SIZE (1024*32)
PRIVATE char random_state[RANDOM_BUFFER_SIZE];
FORWARD _PROTOTYPE( struct device *m_prepare, (int device) );
FORWARD _PROTOTYPE( int m_transfer, (int proc_nr, int opcode, off_t position,
iovec_t *iov, unsigned nr_req) );
@ -98,7 +101,9 @@ off_t position; /* offset on device to read or write */
iovec_t *iov; /* pointer to read or write request vector */
unsigned nr_req; /* length of request vector */
{
/* Read or write /dev/null, /dev/mem, /dev/kmem, /dev/ram, or /dev/boot. */
/* Read or write /dev/null, /dev/mem, /dev/kmem, /dev/ram, /dev/boot,
* /dev/random, or /dev/urandom
*/
int device;
phys_bytes mem_phys, user_phys;
@ -121,6 +126,9 @@ unsigned nr_req; /* length of request vector */
case NULL_DEV:
if (opcode == DEV_GATHER) return(OK); /* always at EOF */
break;
case RANDOM_DEV:
return OK;
break;
default:
/* /dev/mem, /dev/kmem, /dev/ram, /dev/boot: check for EOF */
@ -188,6 +196,11 @@ PRIVATE void m_init()
m_geom[KMEM_DEV].dv_size = cvul64(kenv.kmem_size);
m_geom[BOOT_DEV].dv_base = cvul64(kenv.bootfs_base);
m_geom[BOOT_DEV].dv_size = cvul64(kenv.bootfs_size);
/* dv_base isn't used for the random device */
m_geom[RANDOM_DEV].dv_base = cvul64(NULL);
m_geom[RANDOM_DEV].dv_size = cvul64(RANDOM_BUFFER_SIZE);
psinfo.proc = kenv.proc_addr;
#if (CHIP == INTEL)