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MIPS: Netlogic: Add support for XLP 3XX cores

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Add new processor ID to asm/cpu.h and kernel/cpu-probe.c.
Update to new CPU frequency detection code which works on XLP 3XX
and 8XX.

Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2971/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Jayachandran C 2011-11-16 00:21:29 +00:00 committed by Ralf Baechle
parent 66d29985fa
commit 2aa54b2009
3 changed files with 21 additions and 12 deletions
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4
arch/mips/include/asm/cpu.h
View File

@ -170,7 +170,9 @@
#define PRID_IMP_NETLOGIC_XLS408B 0x4e00
#define PRID_IMP_NETLOGIC_XLS404B 0x4f00
#define PRID_IMP_NETLOGIC_XLP832 0x1000
#define PRID_IMP_NETLOGIC_XLP8XX 0x1000
#define PRID_IMP_NETLOGIC_XLP3XX 0x1100
/*
* Definitions for 7:0 on legacy processors
*/

3
arch/mips/kernel/cpu-probe.c
View File

@ -1025,7 +1025,8 @@ static inline void cpu_probe_netlogic(struct cpuinfo_mips *c, int cpu)
MIPS_CPU_LLSC);
switch (c->processor_id & 0xff00) {
case PRID_IMP_NETLOGIC_XLP832:
case PRID_IMP_NETLOGIC_XLP8XX:
case PRID_IMP_NETLOGIC_XLP3XX:
c->cputype = CPU_XLP;
__cpu_name[cpu] = "Netlogic XLP";
break;

26
arch/mips/netlogic/xlp/nlm_hal.c
View File

@ -86,20 +86,26 @@ int nlm_irt_to_irq(int irt)
}
}
unsigned int nlm_get_cpu_frequency(void)
unsigned int nlm_get_core_frequency(int core)
{
unsigned int pll_divf, pll_divr, dfs_div, denom;
unsigned int val;
unsigned int pll_divf, pll_divr, dfs_div, ext_div;
unsigned int rstval, dfsval, denom;
uint64_t num;
val = nlm_read_sys_reg(nlm_sys_base, SYS_POWER_ON_RESET_CFG);
pll_divf = (val >> 10) & 0x7f;
pll_divr = (val >> 8) & 0x3;
dfs_div = (val >> 17) & 0x3;
rstval = nlm_read_sys_reg(nlm_sys_base, SYS_POWER_ON_RESET_CFG);
dfsval = nlm_read_sys_reg(nlm_sys_base, SYS_CORE_DFS_DIV_VALUE);
pll_divf = ((rstval >> 10) & 0x7f) + 1;
pll_divr = ((rstval >> 8) & 0x3) + 1;
ext_div = ((rstval >> 30) & 0x3) + 1;
dfs_div = ((dfsval >> (core * 4)) & 0xf) + 1;
num = pll_divf + 1;
denom = 3 * (pll_divr + 1) * (1 << (dfs_div + 1));
num = num * 800000000ULL;
num = 800000000ULL * pll_divf;
denom = 3 * pll_divr * ext_div * dfs_div;
do_div(num, denom);
return (unsigned int)num;
}
unsigned int nlm_get_cpu_frequency(void)
{
return nlm_get_core_frequency(0);
}