From: Eddie Dawydiuk <eddie@embeddedarm.com>
To: linuxppc-dev@ozlabs.org, Grant Likely <grant.likely@secretlab.ca>
Subject: PowerPC iotable_init equivalent?
Date: Fri, 17 Apr 2009 14:21:27 -0700 [thread overview]
Message-ID: <49E8F2D7.3050603@embeddedarm.com> (raw)
Hello,
In the past I've worked with ARM architectures where I could setup virtual /
physical address mappings so I don't have to ioremap then pass around pointers.
Does PowerPC have an equivalent abstraction? If not whats the recommended approach?
That is, is there a better approach to the following...
volatile static unsigned char *my_reg = NULL;
static inline void read_func() {
if (!my_reg)
my_reg = (unsigned char *)
ioremap(REG_PHYS_BASE, REG_SIZE);
//do something with the reg
}
static inline void write_func() {
if (!my_reg)
my_reg = (unsigned char *)
ioremap(REG_PHYS_BASE, REG_SIZE);
//do something with the reg
}
--
Best Regards,
________________________________________________________________
Eddie Dawydiuk, Technologic Systems | voice: (480) 837-5200
16525 East Laser Drive | fax: (480) 837-5300
Fountain Hills, AZ 85268 | web: www.embeddedARM.com
next reply other threads:[~2009-04-17 21:18 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-17 21:21 Eddie Dawydiuk [this message]
2009-04-17 21:31 ` PowerPC iotable_init equivalent? Roderick Colenbrander
2009-04-17 21:32 ` Kumar Gala
2009-04-18 5:42 ` Grant Likely
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