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Commit 3e06a163 authored by Stefan Kristiansson's avatar Stefan Kristiansson Committed by Stafford Horne
Browse files

openrisc: add cache way information to cpuinfo 



Motivation for this is to be able to print the way information
properly in print_cpuinfo(), instead of hardcoding it to one.

Signed-off-by: default avatarStefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Signed-off-by: default avatarJonas Bonn <jonas@southpole.se>
[shorne@gmail.com fixed conflict with show_cpuinfo change]
Signed-off-by: default avatarStafford Horne <shorne@gmail.com>
parent c0fcaf55

arch/openrisc/include/asm/cpuinfo.h

+2 −0
Original line number Diff line number Diff line
@@ -24,9 +24,11 @@ struct cpuinfo { 


	u32 icache_size;

	u32 icache_block_size;

	u32 icache_ways;



	u32 dcache_size;

	u32 dcache_block_size;

	u32 dcache_ways;

};



extern struct cpuinfo cpuinfo;

arch/openrisc/kernel/setup.c

+36 −31
Original line number Diff line number Diff line
@@ -117,13 +117,15 @@ static void print_cpuinfo(void) 
	if (upr & SPR_UPR_DCP)

		printk(KERN_INFO

		       "-- dcache: %4d bytes total, %2d bytes/line, %d way(s)\n",

		       cpuinfo.dcache_size, cpuinfo.dcache_block_size, 1);

		       cpuinfo.dcache_size, cpuinfo.dcache_block_size,

		       cpuinfo.dcache_ways);

	else

		printk(KERN_INFO "-- dcache disabled\n");

	if (upr & SPR_UPR_ICP)

		printk(KERN_INFO

		       "-- icache: %4d bytes total, %2d bytes/line, %d way(s)\n",

		       cpuinfo.icache_size, cpuinfo.icache_block_size, 1);

		       cpuinfo.icache_size, cpuinfo.icache_block_size,

		       cpuinfo.icache_ways);

	else

		printk(KERN_INFO "-- icache disabled\n");
@@ -155,25 +157,25 @@ void __init setup_cpuinfo(void) 
{

	struct device_node *cpu;

	unsigned long iccfgr, dccfgr;

	unsigned long cache_set_size, cache_ways;

	unsigned long cache_set_size;



	cpu = of_find_compatible_node(NULL, NULL, "opencores,or1200-rtlsvn481");

	if (!cpu)

		panic("No compatible CPU found in device tree...\n");



	iccfgr = mfspr(SPR_ICCFGR);

	cache_ways = 1 << (iccfgr & SPR_ICCFGR_NCW);

	cpuinfo.icache_ways = 1 << (iccfgr & SPR_ICCFGR_NCW);

	cache_set_size = 1 << ((iccfgr & SPR_ICCFGR_NCS) >> 3);

	cpuinfo.icache_block_size = 16 << ((iccfgr & SPR_ICCFGR_CBS) >> 7);

	cpuinfo.icache_size =

	    cache_set_size * cache_ways * cpuinfo.icache_block_size;

	    cache_set_size * cpuinfo.icache_ways * cpuinfo.icache_block_size;



	dccfgr = mfspr(SPR_DCCFGR);

	cache_ways = 1 << (dccfgr & SPR_DCCFGR_NCW);

	cpuinfo.dcache_ways = 1 << (dccfgr & SPR_DCCFGR_NCW);

	cache_set_size = 1 << ((dccfgr & SPR_DCCFGR_NCS) >> 3);

	cpuinfo.dcache_block_size = 16 << ((dccfgr & SPR_DCCFGR_CBS) >> 7);

	cpuinfo.dcache_size =

	    cache_set_size * cache_ways * cpuinfo.dcache_block_size;

	    cache_set_size * cpuinfo.dcache_ways * cpuinfo.dcache_block_size;



	if (of_property_read_u32(cpu, "clock-frequency",

				 &cpuinfo.clock_frequency)) {
@@ -313,8 +315,10 @@ static int show_cpuinfo(struct seq_file *m, void *v) 
		  "frequency\t: %ld\n"

		  "dcache size\t: %d bytes\n"

		  "dcache block size\t: %d bytes\n"

		  "dcache ways\t: %d\n"

		  "icache size\t: %d bytes\n"

		  "icache block size\t: %d bytes\n"

		  "icache ways\t: %d\n"

		  "immu\t\t: %d entries, %lu ways\n"

		  "dmmu\t\t: %d entries, %lu ways\n"

		  "bogomips\t: %lu.%02lu\n",
@@ -323,15 +327,16 @@ static int show_cpuinfo(struct seq_file *m, void *v) 
		  loops_per_jiffy * HZ,

		  cpuinfo.dcache_size,

		  cpuinfo.dcache_block_size,

		  cpuinfo.dcache_ways,

		  cpuinfo.icache_size,

		  cpuinfo.icache_block_size,

		  cpuinfo.icache_ways,

		  1 << ((mfspr(SPR_DMMUCFGR) & SPR_DMMUCFGR_NTS) >> 2),

		  1 + (mfspr(SPR_DMMUCFGR) & SPR_DMMUCFGR_NTW),

		  1 << ((mfspr(SPR_IMMUCFGR) & SPR_IMMUCFGR_NTS) >> 2),

		  1 + (mfspr(SPR_IMMUCFGR) & SPR_IMMUCFGR_NTW),

		  (loops_per_jiffy * HZ) / 500000,

		  ((loops_per_jiffy * HZ) / 5000) % 100);



	return 0;

}