msm: acpuclock-krait: Discard unused SoC-specific data by using __initdata
Refactor the initialization code so that datastructures that must be
kept are kmemduped and the rest are discarded after the kernel has
booted with the help of __initdata markings.
For a typically-compiled all-in-one kernel containing support for
msm8960, apq8064, msm8627 and msm8930, this allows 11.5K to be moved
from the .data to the .init.data section, with less than 10% of that
retained in dynamically-allocated memory (the exact amount varies
depending on the device the kernel is booted on).
Change-Id: I505eef8f10dc0e44bab15954b797252c3c408e50
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>
diff --git a/arch/arm/mach-msm/acpuclock-krait.h b/arch/arm/mach-msm/acpuclock-krait.h
index cbc1b85..f92aaf3 100644
--- a/arch/arm/mach-msm/acpuclock-krait.h
+++ b/arch/arm/mach-msm/acpuclock-krait.h
@@ -163,7 +163,7 @@
* @droop_offset: Droop controller register offset from base address.
* @droop_val: Value to initialize the @config_offset register to.
* @low_vdd_l_max: Maximum "L" value supported at HFPLL_VDD_LOW.
- * @vdd: voltage requirements for each VDD level.
+ * @vdd: voltage requirements for each VDD level for the L2 PLL.
*/
struct hfpll_data {
const u32 mode_offset;
@@ -186,7 +186,6 @@
* @aux_clk_sel_phys: Physical address of auxiliary MUX.
* @aux_clk_sel: Auxiliary mux input to select at boot.
* @l2cpmr_iaddr: Indirect address of the CPMR MUX/divider CP15 register.
- * @hfpll_data: Descriptive data of HFPLL hardware.
* @cur_speed: Pointer to currently-set speed.
* @l2_vote: L2 performance level vote associate with the current CPU speed.
* @vreg: Array of voltage regulators needed by the scalable.
@@ -198,7 +197,6 @@
const phys_addr_t aux_clk_sel_phys;
const u32 aux_clk_sel;
const u32 l2cpmr_iaddr;
- const struct hfpll_data *hfpll_data;
const struct core_speed *cur_speed;
unsigned int l2_vote;
struct vreg vreg[NUM_VREG];
@@ -206,21 +204,35 @@
};
/**
+ * struct pvs_table - CPU performance level table and size.
+ * @table: CPU performance level table
+ * @size: sizeof(@table)
+ */
+struct pvs_table {
+ struct acpu_level *table;
+ size_t size;
+};
+
+/**
* struct acpuclk_krait_params - SoC specific driver parameters.
* @scalable: Array of scalables.
- * @pvs_acpu_freq_tbl: Array of CPU frequency tables.
+ * @scalable_size: Size of @scalable.
+ * @hfpll_data: HFPLL configuration data.
+ * @pvs_tables: CPU frequency tables.
* @l2_freq_tbl: L2 frequency table.
- * @l2_freq_tbl_size: Number of rows in @l2_freq_tbl.
+ * @l2_freq_tbl_size: Size of @l2_freq_tbl.
* @qfprom_phys_base: Physical base address of QFPROM.
- * @bus_scale_data: MSM bus driver parameters.
+ * @bus_scale: MSM bus driver parameters.
*/
struct acpuclk_krait_params {
struct scalable *scalable;
- struct acpu_level *pvs_acpu_freq_tbl[NUM_PVS];
- const struct l2_level *l2_freq_tbl;
- const size_t l2_freq_tbl_size;
- const phys_addr_t qfprom_phys_base;
- struct msm_bus_scale_pdata *bus_scale_data;
+ size_t scalable_size;
+ struct hfpll_data *hfpll_data;
+ struct pvs_table *pvs_tables;
+ struct l2_level *l2_freq_tbl;
+ size_t l2_freq_tbl_size;
+ phys_addr_t qfprom_phys_base;
+ struct msm_bus_scale_pdata *bus_scale;
};
/**