So I will write .setup_arch of machine_call structure. When is ppc_md.setup_arch() called ?
2008/8/19, Benjamin Herrenschmidt <[EMAIL PROTECTED]>: > > On Tue, 2008-08-19 at 09:00 +0200, Sébastien Chrétien wrote: > > I have no screen that's why I have to use UART. I followed the CPM > > model in head_32.S : > > #ifdef CONFIG_PPC_EARLY_DEBUG_CPM > > setup_cpm_bat: > > lis r8, 0xf000 > > ori r8, r8, 0x002a > > mtspr SPRN_DBAT1L, r8 > > > > lis r11, 0xf000 > > ori r11, r11, (BL_1M << 2) | 2 > > mtspr SPRN_DBAT1U, r11 > > > > blr > > #endif > > > The "EARLY DEBUG" stuff is a pile of hacks to help with bringup, > it's definitely not a long term solution to your problems. > > You may also want to look at Grant Likely's work on doing proper > early ioremap using BATs. > > > > With this code I can use udbg. > > > > According to you, what is the best way ? > > > The above is fine for early debug console. But that's definitely > not the only kind of thing you may want to put in your setup_arch()... > Look at what others do. > > Ben. > > > > 2008/8/18, Benjamin Herrenschmidt <[EMAIL PROTECTED]>: > > On Mon, 2008-08-18 at 16:17 +0200, Sébastien Chrétien wrote: > > > The mpc7448hpc2 uses a tsi108-bridge. My board uses an IP on > > a FPGA.. > > > I read the code of mpc7448_hpc2.c. > > > It uses a ioremap in order to iniatilize the tsi108 > > registers. But I > > > have already initialized MMU with my registers in HEAD_32.S. > > Do I need > > > to use ioremap in setup_arch() ? > > > > > > Why did you hack head_32.S ? You shouldn't do that... This is > > common > > code, not platform code. > > > > Ben. > > > > > > > > > > > > > > 2008/8/18, Michael Ellerman <[EMAIL PROTECTED]>: > > > On Mon, 2008-08-18 at 13:35 +0200, Sébastien > > Chrétien wrote: > > > > Can somebody explain me the aim of the > > > function "setup_arch" in the > > > > machine_call structure ? > > > > > > > > > Is this MPC7448 anything like an mpc7448hpc2 ? > > > > > > If so maybe you should start by looking at the code > > for it in: > > > > > > arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c > > > > > > Even if it's not related, that will give you some > > idea of what > > > the > > > callbacks are for. > > > > > > cheers > > > > > > -- > > > Michael Ellerman > > > OzLabs, IBM Australia Development Lab > > > > > > wwweb: http://michael.ellerman.id.au > > > phone: +61 2 6212 1183 (tie line 70 21183) > > > > > > We do not inherit the earth from our ancestors, > > > we borrow it from our children. - S.M.A.R.T Person > > > > > > > > > > > >
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