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author | David Gibson <david@gibson.dropbear.id.au> | 2011-04-14 22:32:06 (GMT) |
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committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-05-06 03:32:35 (GMT) |
commit | a1d0d98daf6ce580d017a43b09fe30a375cde3e8 (patch) | |
tree | 8aaeff82e2d4edbb8ceec68f1cf5ceecc4c08be1 /arch/powerpc/platforms/wsp/psr2.c | |
parent | 82578e192bb837b984ed5d8389245ea1fee09dd5 (diff) | |
download | linux-fsl-qoriq-a1d0d98daf6ce580d017a43b09fe30a375cde3e8.tar.xz |
powerpc: Add WSP platform
Add a platform for the Wire Speed Processor, based on the PPC A2.
This includes code for the ICS & OPB interrupt controllers, as well
as a SCOM backend, and SCOM based cpu bringup.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Jack Miller <jack@codezen.org>
Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/platforms/wsp/psr2.c')
-rw-r--r-- | arch/powerpc/platforms/wsp/psr2.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/wsp/psr2.c b/arch/powerpc/platforms/wsp/psr2.c new file mode 100644 index 0000000..40f2891 --- /dev/null +++ b/arch/powerpc/platforms/wsp/psr2.c @@ -0,0 +1,95 @@ +/* + * Copyright 2008-2011, IBM Corporation + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/irq.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/of.h> +#include <linux/smp.h> + +#include <asm/machdep.h> +#include <asm/system.h> +#include <asm/time.h> +#include <asm/udbg.h> + +#include "ics.h" +#include "wsp.h" + + +static void psr2_spin(void) +{ + hard_irq_disable(); + for (;;) ; +} + +static void psr2_restart(char *cmd) +{ + psr2_spin(); +} + +static int psr2_probe_devices(void) +{ + struct device_node *np; + + /* Our RTC is a ds1500. It seems to be programatically compatible + * with the ds1511 for which we have a driver so let's use that + */ + np = of_find_compatible_node(NULL, NULL, "dallas,ds1500"); + if (np != NULL) { + struct resource res; + if (of_address_to_resource(np, 0, &res) == 0) + platform_device_register_simple("ds1511", 0, &res, 1); + } + return 0; +} +machine_arch_initcall(psr2_md, psr2_probe_devices); + +static void __init psr2_setup_arch(void) +{ + /* init to some ~sane value until calibrate_delay() runs */ + loops_per_jiffy = 50000000; + + scom_init_wsp(); + + /* Setup SMP callback */ +#ifdef CONFIG_SMP + a2_setup_smp(); +#endif +} + +static int __init psr2_probe(void) +{ + unsigned long root = of_get_flat_dt_root(); + + if (!of_flat_dt_is_compatible(root, "ibm,psr2")) + return 0; + + return 1; +} + +static void __init psr2_init_irq(void) +{ + wsp_init_irq(); + opb_pic_init(); +} + +define_machine(psr2_md) { + .name = "PSR2 A2", + .probe = psr2_probe, + .setup_arch = psr2_setup_arch, + .restart = psr2_restart, + .power_off = psr2_spin, + .halt = psr2_spin, + .calibrate_decr = generic_calibrate_decr, + .init_IRQ = psr2_init_irq, + .progress = udbg_progress, + .power_save = book3e_idle, +}; |